diff --git a/elab_scope.cc b/elab_scope.cc
index fe39506e9..826154eae 100644
--- a/elab_scope.cc
+++ b/elab_scope.cc
@@ -21,6 +21,8 @@
 # include  "config.h"
 # include  "compiler.h"
 # include  "netmisc.h"
+# include  "netvector.h"
+# include  "netparray.h"
 # include  <cstring>
 # include  <iostream>
 # include  <cstdlib>
@@ -166,27 +168,31 @@ static void collect_scope_specparams(Design*des, NetScope*scope,
 static void elaborate_scope_enumeration(Design*des, NetScope*scope,
 					enum_type_t*enum_type)
 {
-      std::vector<netrange_t> ranges;
-      netrange_t range;
+      ivl_type_t base_type;
       bool rc_flag;
 
-      if (enum_type->range.get())
-	    evaluate_ranges(des, scope, enum_type, ranges, *enum_type->range);
+      base_type = enum_type->base_type->elaborate_type(des, scope);
 
-      if (!ranges.empty()) {
-	    range = ranges.front();
-	    if (ranges.size() > 1) {
-		  cerr << enum_type->get_fileline() << ": error: "
-		       << "Enum type must not have more than 1 packed dimension."
-		       << endl;
-		  des->errors++;
-	    }
+      const struct netvector_t *vec_type = dynamic_cast<const netvector_t*>(base_type);
+
+      if (!vec_type && !dynamic_cast<const netparray_t*>(base_type)) {
+	    cerr << enum_type->get_fileline() << ": error: "
+		 << "Invalid enum base type `" << *base_type << "`."
+		 << endl;
+	    des->errors++;
+      } else if (base_type->slice_dimensions().size() > 1) {
+	    cerr << enum_type->get_fileline() << ": error: "
+		 << "Enum type must not have more than 1 packed dimension."
+		 << endl;
+	    des->errors++;
       }
 
-      netenum_t*use_enum = new netenum_t(enum_type->base_type,
-					 enum_type->signed_flag,
-					 enum_type->integer_flag, range,
-					 enum_type->names->size());
+      bool integer_flag = false;
+      if (vec_type)
+	    integer_flag = vec_type->get_isint();
+
+      netenum_t*use_enum = new netenum_t(base_type, enum_type->names->size(),
+				         integer_flag);
 
       use_enum->set_line(*enum_type);
       scope->add_enumeration_set(enum_type, use_enum);
@@ -196,20 +202,21 @@ static void elaborate_scope_enumeration(Design*des, NetScope*scope,
       long raw_width = use_enum->packed_width();
       assert(raw_width > 0);
       unsigned enum_width = (unsigned)raw_width;
+      bool is_signed = use_enum->get_signed();
 	// Define the default start value and the increment value to be the
 	// correct type for this enumeration.
       verinum cur_value ((uint64_t)0, enum_width);
-      cur_value.has_sign(enum_type->signed_flag);
+      cur_value.has_sign(is_signed);
       verinum one_value ((uint64_t)1, enum_width);
-      one_value.has_sign(enum_type->signed_flag);
+      one_value.has_sign(is_signed);
 	// Find the maximum allowed enumeration value.
       verinum max_value (0);
-      if (enum_type->signed_flag) {
+      if (is_signed) {
 	    max_value = pow(verinum(2), verinum(enum_width-1)) - one_value;
       } else {
 	    max_value = pow(verinum(2), verinum(enum_width)) - one_value;
       }
-      max_value.has_sign(enum_type->signed_flag);
+      max_value.has_sign(is_signed);
 	// Variable to indicate when a defined value wraps.
       bool implicit_wrapped = false;
 	// Process the enumeration definition.
@@ -234,7 +241,7 @@ static void elaborate_scope_enumeration(Design*des, NetScope*scope,
 		  implicit_wrapped = false;
 
 		    // A 2-state value can not have a constant with X/Z bits.
-		  if (enum_type->base_type==IVL_VT_BOOL &&
+		  if (use_enum->base_type() == IVL_VT_BOOL &&
 		      ! cur_value.is_defined()) {
 			cerr << use_enum->get_fileline()
 			     << ": error: Enumeration name " << cur->name
@@ -259,7 +266,7 @@ static void elaborate_scope_enumeration(Design*des, NetScope*scope,
 		    // value does not have a defined width.
 		  if (((cur_value.len() != enum_width) ||
 		       ! cur_value.has_len()) &&
-		      ! enum_type->signed_flag && cur_value.is_negative()) {
+		      ! is_signed && cur_value.is_negative()) {
 			cerr << use_enum->get_fileline()
 			     << ": error: Enumeration name " << cur->name
 			     << " has a negative value." << endl;
@@ -282,7 +289,7 @@ static void elaborate_scope_enumeration(Design*des, NetScope*scope,
 			      if (cur_value[idx] != cur_value[check_width]) {
 				      // If this is an unsigned enumeration
 				      // then zero padding is okay.
-				    if (! enum_type->signed_flag &&
+				    if (!is_signed &&
 				        (idx == enum_width) &&
 				        (cur_value[idx] == verinum::V0)) {
 					  check_width += 1;
@@ -328,7 +335,7 @@ static void elaborate_scope_enumeration(Design*des, NetScope*scope,
 		    // At this point the value has the correct size and needs
 		    // to have the correct sign attribute set.
 		  cur_value.has_len(true);
-		  cur_value.has_sign(enum_type->signed_flag);
+		  cur_value.has_sign(is_signed);
 
 	    } else if (! cur_value.is_defined()) {
 		  cerr << use_enum->get_fileline()
diff --git a/ivtest/ivltests/enum_base_atom2.v b/ivtest/ivltests/enum_base_atom2.v
new file mode 100644
index 000000000..467ed0d00
--- /dev/null
+++ b/ivtest/ivltests/enum_base_atom2.v
@@ -0,0 +1,31 @@
+// Check that it is possible to declare an enum type with an atom2 type as the
+// base type.
+
+module test;
+
+  enum byte {
+    A
+  } e1;
+
+  enum shortint {
+    B
+  } e2;
+
+  enum int {
+    C
+  } e3;
+
+  enum longint {
+    D
+  } e4;
+
+  initial begin
+    if ($bits(e1) == 8 && $bits(e2) == 16 &&
+        $bits(e3) == 32 && $bits(e4) == 64) begin
+      $display("PASSED");
+    end else begin
+      $display("FAILED");
+    end
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_fail_array.v b/ivtest/ivltests/enum_base_fail_array.v
new file mode 100644
index 000000000..6e11d34d9
--- /dev/null
+++ b/ivtest/ivltests/enum_base_fail_array.v
@@ -0,0 +1,16 @@
+// Check that using an array type as the base type for an enum results in an
+// error.
+
+module test;
+
+  typedef logic T[1:0];
+
+  enum T {
+    A
+  } e;
+
+  initial begin
+    $display("FAILED");
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_fail_class.v b/ivtest/ivltests/enum_base_fail_class.v
new file mode 100644
index 000000000..cd36d254a
--- /dev/null
+++ b/ivtest/ivltests/enum_base_fail_class.v
@@ -0,0 +1,17 @@
+// Check that using a class type as the base type for an enum results in an
+// error.
+
+class C;
+endclass
+
+module test;
+
+  enum C {
+    A
+  } e;
+
+  initial begin
+    $display("FAILED");
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_fail_darray.v b/ivtest/ivltests/enum_base_fail_darray.v
new file mode 100644
index 000000000..7eeb8718d
--- /dev/null
+++ b/ivtest/ivltests/enum_base_fail_darray.v
@@ -0,0 +1,16 @@
+// Check that using a dynamic array type as the base type for an enum results in
+// an error.
+
+module test;
+
+  typedef logic T[];
+
+  enum T {
+    A
+  } e;
+
+  initial begin
+    $display("FAILED");
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_fail_enum.v b/ivtest/ivltests/enum_base_fail_enum.v
new file mode 100644
index 000000000..32b84efd5
--- /dev/null
+++ b/ivtest/ivltests/enum_base_fail_enum.v
@@ -0,0 +1,18 @@
+// Check that using an enum type as the base type for an enum results in an
+// error.
+
+module test;
+
+  typedef enum {
+    X
+  } T;
+
+  enum T {
+    A
+  } e;
+
+  initial begin
+    $display("FAILED");
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_fail_queue.v b/ivtest/ivltests/enum_base_fail_queue.v
new file mode 100644
index 000000000..38a0921aa
--- /dev/null
+++ b/ivtest/ivltests/enum_base_fail_queue.v
@@ -0,0 +1,16 @@
+// Check that using a queue type as the base type for an enum results in an
+// error
+
+module test;
+
+  typedef logic T[$];
+
+  enum T {
+    A
+  } e;
+
+  initial begin
+    $display("FAILED");
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_fail_range1.v b/ivtest/ivltests/enum_base_fail_range1.v
new file mode 100644
index 000000000..a5bbf74a4
--- /dev/null
+++ b/ivtest/ivltests/enum_base_fail_range1.v
@@ -0,0 +1,17 @@
+// Check that using a type identifier that resolves to a type with a packed
+// dimensions together with another packed dimensions as the base type for an
+// enum results in an error.
+
+module test;
+
+  typedef int T;
+
+  enum T [1:0] {
+    A
+  } e;
+
+  initial begin
+    $display("FAILED");
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_fail_range2.v b/ivtest/ivltests/enum_base_fail_range2.v
new file mode 100644
index 000000000..e82e640bd
--- /dev/null
+++ b/ivtest/ivltests/enum_base_fail_range2.v
@@ -0,0 +1,16 @@
+// Check that using a type identifier that resolves to a type with multiple
+// packed dimensions as the base type for an enum results in an error.
+
+module test;
+
+  typedef bit [1:0][1:0] T;
+
+  enum T {
+    A
+  } e;
+
+  initial begin
+    $display("FAILED");
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_fail_range3.v b/ivtest/ivltests/enum_base_fail_range3.v
new file mode 100644
index 000000000..a7ccf5928
--- /dev/null
+++ b/ivtest/ivltests/enum_base_fail_range3.v
@@ -0,0 +1,14 @@
+// Check that specifying a vector type with multiple packed dimensions as the
+// base type for an enum results in an error.
+
+module test;
+
+  enum logic [1:0][1:0] {
+    A
+  } e;
+
+  initial begin
+    $display("FAILED");
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_fail_real1.v b/ivtest/ivltests/enum_base_fail_real1.v
new file mode 100644
index 000000000..cfd5df8bf
--- /dev/null
+++ b/ivtest/ivltests/enum_base_fail_real1.v
@@ -0,0 +1,14 @@
+// Check that using a real type as the base type for an enum results in an
+// error.
+
+module test;
+
+  enum real {
+    A
+  } e;
+
+  initial begin
+    $display("FAILED");
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_fail_real2.v b/ivtest/ivltests/enum_base_fail_real2.v
new file mode 100644
index 000000000..c51748e21
--- /dev/null
+++ b/ivtest/ivltests/enum_base_fail_real2.v
@@ -0,0 +1,16 @@
+// Check that using a real type as the base type for an enum results in an
+// error.
+
+module test;
+
+  typedef real T;
+
+  enum T {
+    A
+  } e;
+
+  initial begin
+    $display("FAILED");
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_fail_string1.v b/ivtest/ivltests/enum_base_fail_string1.v
new file mode 100644
index 000000000..58b789a46
--- /dev/null
+++ b/ivtest/ivltests/enum_base_fail_string1.v
@@ -0,0 +1,14 @@
+// Check that using a string type as the base type for an enum results in an
+// error.
+
+module test;
+
+  enum string {
+    A
+  } e;
+
+  initial begin
+    $display("FAILED");
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_fail_string2.v b/ivtest/ivltests/enum_base_fail_string2.v
new file mode 100644
index 000000000..638282f09
--- /dev/null
+++ b/ivtest/ivltests/enum_base_fail_string2.v
@@ -0,0 +1,16 @@
+// Check that using a string type as the base type for an enum results in an
+// error.
+
+module test;
+
+  typedef string T;
+
+  enum T {
+    A
+  } e;
+
+  initial begin
+    $display("FAILED");
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_fail_struct.v b/ivtest/ivltests/enum_base_fail_struct.v
new file mode 100644
index 000000000..556fb092c
--- /dev/null
+++ b/ivtest/ivltests/enum_base_fail_struct.v
@@ -0,0 +1,18 @@
+// Check that using a struct type as the base type for an enum results in an
+// error.
+
+module test;
+
+  typedef struct packed {
+    int x;
+  } T;
+
+  enum T {
+    A
+  } e;
+
+  initial begin
+    $display("FAILED");
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_integer.v b/ivtest/ivltests/enum_base_integer.v
new file mode 100644
index 000000000..a419dddcc
--- /dev/null
+++ b/ivtest/ivltests/enum_base_integer.v
@@ -0,0 +1,18 @@
+// Check that it is possible to declare an enum type with the integer type as
+// the base type.
+
+module test;
+
+  enum integer {
+    A
+  } E;
+
+  initial begin
+    if ($bits(E) == $bits(integer)) begin
+      $display("PASSED");
+    end else begin
+      $display("FAILED");
+    end
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_none.v b/ivtest/ivltests/enum_base_none.v
new file mode 100644
index 000000000..ab5d06ac0
--- /dev/null
+++ b/ivtest/ivltests/enum_base_none.v
@@ -0,0 +1,18 @@
+// Check that it is possible to declare an enum type without an explicit base
+// type. In this case the base type should default to `int`.
+
+module test;
+
+  enum {
+    A
+  } E;
+
+  initial begin
+    if ($bits(E) == 32) begin
+      $display("PASSED");
+    end else begin
+      $display("FAILED");
+    end
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_scalar.v b/ivtest/ivltests/enum_base_scalar.v
new file mode 100644
index 000000000..baf859934
--- /dev/null
+++ b/ivtest/ivltests/enum_base_scalar.v
@@ -0,0 +1,26 @@
+// Check that it is possible to declare an enum type with a scalar vector type
+// as the base type.
+
+module test;
+
+  enum reg {
+    A
+  } e1;
+
+  enum logic {
+    B
+  } e2;
+
+  enum bit {
+    C
+  } e3;
+
+  initial begin
+    if ($bits(e1) == 1 && $bits(e2) == 1 && $bits(e3) == 1) begin
+      $display("PASSED");
+    end else begin
+      $display("FAILED");
+    end
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_time.v b/ivtest/ivltests/enum_base_time.v
new file mode 100644
index 000000000..b8923ef23
--- /dev/null
+++ b/ivtest/ivltests/enum_base_time.v
@@ -0,0 +1,18 @@
+// Check that it is possible to declare an enum type with the time type as the
+// base type.
+
+module test;
+
+  enum time {
+    A
+  } E;
+
+  initial begin
+    if ($bits(E) == 64) begin
+      $display("PASSED");
+    end else begin
+      $display("FAILED");
+    end
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_typename1.v b/ivtest/ivltests/enum_base_typename1.v
new file mode 100644
index 000000000..98dbaca1b
--- /dev/null
+++ b/ivtest/ivltests/enum_base_typename1.v
@@ -0,0 +1,20 @@
+// Check that it is possible to declare an enum type with a type identifier that
+// resolves to an integer type as the base type.
+
+module test;
+
+  typedef integer T;
+
+  enum T {
+    A
+  } E;
+
+  initial begin
+    if ($bits(E) == $bits(integer)) begin
+      $display("PASSED");
+    end else begin
+      $display("FAILED");
+    end
+  end
+
+endmodule
diff --git a/ivtest/ivltests/enum_base_typename2.v b/ivtest/ivltests/enum_base_typename2.v
new file mode 100644
index 000000000..efd1a2302
--- /dev/null
+++ b/ivtest/ivltests/enum_base_typename2.v
@@ -0,0 +1,20 @@
+// Check that it is possible to declare an enum type with a type identifier plus
+// packed dimensions as the the base type.
+
+module test;
+
+  typedef bit T;
+
+  enum T [31:0] {
+    A
+  } E;
+
+  initial begin
+    if ($bits(E) == 32) begin
+      $display("PASSED");
+    end else begin
+      $display("FAILED");
+    end
+  end
+
+endmodule
diff --git a/ivtest/regress-sv.list b/ivtest/regress-sv.list
index 70e7b90c5..291377749 100644
--- a/ivtest/regress-sv.list
+++ b/ivtest/regress-sv.list
@@ -231,7 +231,27 @@ clkgen_reg		normal,-g2009		ivltests
 disable_fork_cmd	normal,-g2009		ivltests
 display_bug		normal,-g2009		ivltests gold=display_bug.gold
 edge			normal,-g2009		ivltests
+enum_base_atom2		normal,-g2005-sv	ivltests
+enum_base_fail_array	CE,-g2005-sv		ivltests
+enum_base_fail_darray	CE,-g2005-sv		ivltests
+enum_base_fail_darray	CE,-g2005-sv		ivltests
+enum_base_fail_enum	CE,-g2005-sv		ivltests
+enum_base_fail_queue	CE,-g2005-sv		ivltests
+enum_base_fail_range1	CE,-g2005-sv		ivltests
+enum_base_fail_range2	CE,-g2005-sv		ivltests
+enum_base_fail_range3	CE,-g2005-sv		ivltests
+enum_base_fail_real1	CE,-g2005-sv		ivltests
+enum_base_fail_real2	CE,-g2005-sv		ivltests
+enum_base_fail_string1	CE,-g2005-sv		ivltests
+enum_base_fail_string2	CE,-g2005-sv		ivltests
+enum_base_fail_struct	CE,-g2005-sv		ivltests
+enum_base_integer	normal,-g2005-sv	ivltests
+enum_base_none		normal,-g2005-sv	ivltests
 enum_base_range		normal,-g2005-sv	ivltests
+enum_base_scalar	normal,-g2005-sv	ivltests
+enum_base_time		normal,-g2005-sv	ivltests
+enum_base_typename1	normal,-g2005-sv	ivltests
+enum_base_typename2	normal,-g2005-sv	ivltests
 enum_compatibility1	normal,-g2005-sv	ivltests
 enum_compatibility2	normal,-g2005-sv	ivltests
 enum_compatibility3	normal,-g2005-sv	ivltests
diff --git a/ivtest/regress-vlog95.list b/ivtest/regress-vlog95.list
index cb68c4df5..8357e0afc 100644
--- a/ivtest/regress-vlog95.list
+++ b/ivtest/regress-vlog95.list
@@ -776,6 +776,8 @@ constfunc6_ams		normal,-pallowsigned=1	ivltests
 constfunc7		normal,-pallowsigned=1	ivltests
 constfunc13		normal,-pallowsigned=1	ivltests
 constfunc14		normal,-pallowsigned=1	ivltests
+enum_base_atom2		normal,-g2005-sv,-pallowsigned=1    ivltests
+enum_base_none		normal,-g2005-sv,-pallowsigned=1    ivltests
 enum_elem_ranges	normal,-g2009,-pallowsigned=1	ivltests
 enum_value_expr		normal,-g2009,-pallowsigned=1	ivltests
 enum_values		normal,-g2009,-pallowsigned=1	ivltests
diff --git a/netenum.cc b/netenum.cc
index 7ff455926..1cedf2e85 100644
--- a/netenum.cc
+++ b/netenum.cc
@@ -23,10 +23,9 @@
 
 using namespace std;
 
-netenum_t::netenum_t(ivl_variable_type_t btype, bool signed_flag,
-		     bool integer_flag, const netrange_t &range, size_t name_count)
-: base_type_(btype), signed_flag_(signed_flag), integer_flag_(integer_flag),
-  range_(range), names_(name_count), bits_(name_count)
+netenum_t::netenum_t(ivl_type_t btype, size_t name_count, bool integer_flag)
+: base_type_(btype), integer_flag_(integer_flag), names_(name_count),
+  bits_(name_count)
 {
 }
 
@@ -36,7 +35,7 @@ netenum_t::~netenum_t()
 
 bool netenum_t::get_signed() const
 {
-      return signed_flag_;
+      return base_type_->get_signed();
 }
 
 bool netenum_t::get_isint() const
@@ -54,12 +53,12 @@ bool netenum_t::packed() const
 
 long netenum_t::packed_width() const
 {
-	return range_.width();
+	return base_type_->packed_width();
 }
 
 vector<netrange_t> netenum_t::slice_dimensions() const
 {
-      return vector<netrange_t>(1, range_);
+      return base_type_->slice_dimensions();
 }
 
 bool netenum_t::insert_name(size_t name_idx, perm_string name, const verinum&val)
diff --git a/netenum.h b/netenum.h
index 94f7cd8cd..b2d64397a 100644
--- a/netenum.h
+++ b/netenum.h
@@ -32,9 +32,8 @@ class NetScope;
 class netenum_t : public LineInfo, public ivl_type_s {
 
     public:
-      explicit netenum_t(ivl_variable_type_t base_type, bool signed_flag,
-			 bool isint_flag, const netrange_t &range,
-			 size_t name_count);
+      explicit netenum_t(ivl_type_t base_type, size_t name_count,
+			 bool integer_flag);
       ~netenum_t();
 
       virtual ivl_variable_type_t base_type() const;
@@ -71,10 +70,8 @@ class netenum_t : public LineInfo, public ivl_type_s {
       bool matches(const netenum_t*other) const;
 
     private:
-      ivl_variable_type_t base_type_;
-      bool signed_flag_;
+      ivl_type_t base_type_;
       bool integer_flag_;
-      netrange_t range_;
 
       std::map<perm_string,verinum> names_map_;
       std::vector<perm_string> names_;
@@ -82,7 +79,7 @@ class netenum_t : public LineInfo, public ivl_type_s {
 };
 
 inline ivl_variable_type_t netenum_t::base_type() const
-{ return base_type_; }
+{ return base_type_->base_type(); }
 
 inline size_t netenum_t::size() const { return names_.size(); }
 
diff --git a/parse.y b/parse.y
index dc4938e7d..004fb8001 100644
--- a/parse.y
+++ b/parse.y
@@ -439,8 +439,6 @@ static void current_function_set_statement(const YYLTYPE&loc, std::vector<Statem
       Statement*statement;
       std::vector<Statement*>*statement_list;
 
-      enum_type_t*enum_type;
-
       decl_assignment_t*decl_assignment;
       std::list<decl_assignment_t*>*decl_assignments;
 
@@ -620,7 +618,7 @@ static void current_function_set_statement(const YYLTYPE&loc, std::vector<Statem
 %type <expr> tf_port_item_expr_opt value_range_expression
 
 %type <named_pexprs> enum_name_list enum_name
-%type <enum_type> enum_data_type enum_base_type
+%type <data_type> enum_data_type enum_base_type
 
 %type <tf_ports> tf_item_declaration tf_item_list tf_item_list_opt
 %type <tf_ports> tf_port_declaration tf_port_item tf_port_item_list tf_port_list tf_port_list_opt
@@ -659,6 +657,7 @@ static void current_function_set_statement(const YYLTYPE&loc, std::vector<Statem
 %type <data_type>  simple_type_or_string let_formal_type
 %type <data_type>  packed_array_data_type
 %type <data_type>  ps_type_identifier
+%type <data_type>  simple_packed_type
 %type <class_type> class_identifier
 %type <struct_member>  struct_union_member
 %type <struct_members> struct_union_member_list
@@ -1222,17 +1221,12 @@ packed_array_data_type /* IEEE1800-2005: A.2.2.1 */
   | ps_type_identifier
   ;
 
-data_type /* IEEE1800-2005: A.2.2.1 */
+simple_packed_type /* Integer and vector types */
   : integer_vector_type unsigned_signed_opt dimensions_opt
       { vector_type_t*tmp = new vector_type_t($1, $2, $3);
 	FILE_NAME(tmp, @1);
 	$$ = tmp;
       }
-  | non_integer_type
-      { real_type_t*tmp = new real_type_t($1);
-	FILE_NAME(tmp, @1);
-	$$ = tmp;
-      }
   | atom2_type signed_unsigned_opt
       { atom2_type_t*tmp = new atom2_type_t($1, $2);
 	FILE_NAME(tmp, @1);
@@ -1249,6 +1243,17 @@ data_type /* IEEE1800-2005: A.2.2.1 */
 	vector_type_t*tmp = new vector_type_t(IVL_VT_LOGIC, $2, pd);
 	$$ = tmp;
       }
+  ;
+
+data_type /* IEEE1800-2005: A.2.2.1 */
+  : simple_packed_type
+      { $$ = $1;
+      }
+  | non_integer_type
+      { real_type_t*tmp = new real_type_t($1);
+	FILE_NAME(tmp, @1);
+	$$ = tmp;
+      }
   | packed_array_data_type dimensions_opt
       { if ($2) {
 	      parray_type_t*tmp = new parray_type_t($1, $2);
@@ -2736,43 +2741,26 @@ type_declaration
      can be any of the integral or vector types. */
 
 enum_base_type /* IEEE 1800-2012 A.2.2.1 */
-  :
-      { enum_type_t*enum_type = new enum_type_t;
-	enum_type->base_type = IVL_VT_BOOL;
-	enum_type->signed_flag = true;
-	enum_type->integer_flag = false;
-	enum_type->range.reset(make_range_from_width(32));
-	$$ = enum_type;
+  : simple_packed_type
+      { $$ = $1;
       }
-  | atom2_type signed_unsigned_opt
-      { enum_type_t*enum_type = new enum_type_t;
-	enum_type->base_type = IVL_VT_BOOL;
-	enum_type->signed_flag = $2;
-	enum_type->integer_flag = false;
-	enum_type->range.reset(make_range_from_width($1));
-	$$ = enum_type;
+  | ps_type_identifier dimensions_opt
+      { if ($2) {
+	      $$ = new parray_type_t($1, $2);
+	      FILE_NAME($$, @1);
+        } else {
+	      $$ = $1;
+        }
       }
-  | K_integer signed_unsigned_opt
-      { enum_type_t*enum_type = new enum_type_t;
-	enum_type->base_type = IVL_VT_LOGIC;
-	enum_type->signed_flag = $2;
-	enum_type->integer_flag = true;
-	enum_type->range.reset(make_range_from_width(integer_width));
-	$$ = enum_type;
-      }
-  | integer_vector_type unsigned_signed_opt dimensions_opt
-      { enum_type_t*enum_type = new enum_type_t;
-	enum_type->base_type = $1;
-	enum_type->signed_flag = $2;
-	enum_type->integer_flag = false;
-	enum_type->range.reset($3 ? $3 : make_range_from_width(1));
-	$$ = enum_type;
+   |
+      { $$ = new atom2_type_t(32, true);
+        FILE_NAME($$, @0);
       }
   ;
 
 enum_data_type /* IEEE 1800-2012 A.2.2.1 */
   : K_enum enum_base_type '{' enum_name_list '}'
-      { enum_type_t*enum_type = $2;
+      { enum_type_t*enum_type = new enum_type_t($2);
 	FILE_NAME(enum_type, @1);
 	enum_type->names.reset($4);
 	pform_put_enum_type_in_scope(enum_type);
diff --git a/pform_types.cc b/pform_types.cc
index 21dc725ab..28dfe15fc 100644
--- a/pform_types.cc
+++ b/pform_types.cc
@@ -50,7 +50,7 @@ ivl_variable_type_t vector_type_t::figure_packed_base_type(void) const
 
 ivl_variable_type_t enum_type_t::figure_packed_base_type() const
 {
-      return base_type;
+      return base_type->figure_packed_base_type();
 }
 
 ivl_variable_type_t atom2_type_t::figure_packed_base_type() const
diff --git a/pform_types.h b/pform_types.h
index 3bbd32286..b32f674bd 100644
--- a/pform_types.h
+++ b/pform_types.h
@@ -178,6 +178,8 @@ struct void_type_t : public data_type_t {
  * until it is elaborated in a scope.
  */
 struct enum_type_t : public data_type_t {
+      explicit enum_type_t(data_type_t *btype) : base_type(btype) { }
+
 	// Return the elaborated version of the type.
       ivl_type_t elaborate_type_raw(Design*des, NetScope*scope) const;
 
@@ -185,10 +187,7 @@ struct enum_type_t : public data_type_t {
 
       SymbolType symbol_type() const;
 
-      ivl_variable_type_t base_type;
-      bool signed_flag;
-      bool integer_flag; // True if "integer" was used
-      std::unique_ptr< std::list<pform_range_t> > range;
+      data_type_t *base_type;
       std::unique_ptr< std::list<named_pexpr_t> > names;
 };