diff --git a/PExpr.cc b/PExpr.cc
index c4d641711..0c1be3322 100644
--- a/PExpr.cc
+++ b/PExpr.cc
@@ -142,6 +142,11 @@ PECastSize::~PECastSize()
 {
 }
 
+bool PECastSize::has_aa_term(Design *des, NetScope *scope) const
+{
+	return base_->has_aa_term(des, scope);
+}
+
 PECastType::PECastType(data_type_t*t, PExpr*b)
 : target_(t), base_(b)
 {
@@ -151,12 +156,22 @@ PECastType::~PECastType()
 {
 }
 
+bool PECastType::has_aa_term(Design *des, NetScope *scope) const
+{
+	return base_->has_aa_term(des, scope);
+}
+
 PECastSign::PECastSign(bool signed_flag, PExpr *base)
 : base_(base)
 {
     signed_flag_ = signed_flag;
 }
 
+bool PECastSign::has_aa_term(Design *des, NetScope *scope) const
+{
+	return base_->has_aa_term(des, scope);
+}
+
 PEBComp::PEBComp(char op, PExpr*l, PExpr*r)
 : PEBinary(op, l, r)
 {
diff --git a/PExpr.h b/PExpr.h
index f84e7d290..c765bec36 100644
--- a/PExpr.h
+++ b/PExpr.h
@@ -972,6 +972,8 @@ class PECastSize  : public PExpr {
 				     unsigned expr_wid,
                                      unsigned flags) const;
 
+      virtual bool has_aa_term(Design *des, NetScope *scope) const;
+
       virtual unsigned test_width(Design*des, NetScope*scope,
 				  width_mode_t&mode);
 
@@ -997,6 +999,8 @@ class PECastType  : public PExpr {
       virtual NetExpr*elaborate_expr(Design*des, NetScope*scope,
 				     unsigned expr_wid, unsigned flags) const;
 
+      virtual bool has_aa_term(Design *des, NetScope *scope) const;
+
       virtual unsigned test_width(Design*des, NetScope*scope,
 				  width_mode_t&mode);
 
@@ -1020,6 +1024,8 @@ class PECastSign : public PExpr {
       NetExpr* elaborate_expr(Design *des, NetScope *scope,
 			      unsigned expr_wid, unsigned flags) const;
 
+      virtual bool has_aa_term(Design *des, NetScope *scope) const;
+
       unsigned test_width(Design *des, NetScope *scope, width_mode_t &mode);
 
     private:
diff --git a/ivtest/ivltests/automatic_error16.v b/ivtest/ivltests/automatic_error16.v
new file mode 100644
index 000000000..5d844839a
--- /dev/null
+++ b/ivtest/ivltests/automatic_error16.v
@@ -0,0 +1,21 @@
+// Check that an expression is correctly detected to contain an automatic
+// variable if the variable is in a SystemVerilog size cast expression.
+
+module automatic_error;
+
+  reg g;
+
+  task automatic auto_task;
+    reg l;
+
+    begin: block
+      assign g = 1'(l);
+    end
+  endtask
+
+  initial begin
+    auto_task;
+    $display("FAILED");
+  end
+
+endmodule
diff --git a/ivtest/ivltests/automatic_error17.v b/ivtest/ivltests/automatic_error17.v
new file mode 100644
index 000000000..4615cefae
--- /dev/null
+++ b/ivtest/ivltests/automatic_error17.v
@@ -0,0 +1,22 @@
+// Check that an expression is correctly detected to contain an automatic
+// variable if the variable is in a SystemVerilog sign cast expression.
+
+module test;
+
+  reg g;
+
+  task automatic auto_task;
+    reg l;
+
+    begin: block
+      assign g = signed'(l);
+    end
+
+  endtask
+
+  initial begin
+    auto_task;
+    $display("FAILED");
+  end
+
+endmodule
diff --git a/ivtest/ivltests/automatic_error18.v b/ivtest/ivltests/automatic_error18.v
new file mode 100644
index 000000000..d6877158a
--- /dev/null
+++ b/ivtest/ivltests/automatic_error18.v
@@ -0,0 +1,22 @@
+// Check that an expression is correctly detected to contain an automatic
+// variable if the variable is in a SystemVerilog type cast expression.
+
+module test;
+
+  reg g;
+
+  task automatic auto_task;
+    reg l;
+
+    begin: block
+      assign g = reg'(l);
+    end
+
+  endtask
+
+  initial begin
+    auto_task;
+    $display("FAILED");
+  end
+
+endmodule
diff --git a/ivtest/regress-sv.list b/ivtest/regress-sv.list
index 4825b76a7..e9f4a5ad2 100644
--- a/ivtest/regress-sv.list
+++ b/ivtest/regress-sv.list
@@ -106,6 +106,9 @@ assign_op_real_array_oob normal,-g2009		ivltests
 assign_op_type		normal,-g2009		ivltests
 automatic_error14	CE,-g2005-sv		ivltests
 automatic_error15	CE,-g2005-sv		ivltests
+automatic_error16	CE,-g2005-sv		ivltests
+automatic_error17	CE,-g2005-sv		ivltests
+automatic_error18	CE,-g2005-sv		ivltests
 bitp1			normal,-g2005-sv	ivltests
 bits			normal,-g2005-sv	ivltests
 bits2			normal,-g2005-sv	ivltests