diff --git a/src/verilog.y b/src/verilog.y
index fbf1142a9..02da23103 100644
--- a/src/verilog.y
+++ b/src/verilog.y
@@ -3228,12 +3228,23 @@ cellparamItemE<pinp>:           // IEEE: named_parameter_assignment + empty
         |       '.' idAny '(' exprOrDataType ')'
                         { $$ = new AstPin{$<fl>2, PINNUMINC(), *$2, $4};
                           $$->svDotName(true); }
-        //UNSUP '.' idAny '(' exprOrDataType/*expr*/ ':' expr ')'               { }
-        //UNSUP '.' idAny '(' exprOrDataType/*expr*/ ':' expr ':' expr ')'      { }
+        //UNSUP | '.' idAny '(' exprOrDataType/*expr*/ ':' expr ')'
+        //UNSUP          { MINTYPMAXDLYUNSUP($4); DEL($4);
+        //UNSUP            $$ = new AstPin{$<fl>2, PINNUMINC(), *$2, $6};
+        //UNSUP            $$->svDotName(true); }
+        //UNSUP | '.' idAny '(' exprOrDataType/*expr*/ ':' expr ':' expr ')'
+        //UNSUP          { MINTYPMAXDLYUNSUP($4); DEL($4); DEL($8);
+        //UNSUP            $$ = new AstPin{$<fl>2, PINNUMINC(), *$2, $6};
+        //UNSUP            $$->svDotName(true); }
         //                      // data_type for 'parameter type' hookups
-        |       exprOrDataType                          { $$ = new AstPin{FILELINE_OR_CRE($1), PINNUMINC(), "", $1}; }
-        //UNSUP exprOrDataType/*expr*/ ':' expr         { }
-        //UNSUP exprOrDataType/*expr*/ ':' expr ':' expr        { }
+        |       exprOrDataType
+                        { $$ = new AstPin{FILELINE_OR_CRE($1), PINNUMINC(), "", $1}; }
+        //UNSUP | exprOrDataType/*expr*/ ':' expr
+        //UNSUP          { MINTYPMAXDLYUNSUP($1); DEL($1);
+        //UNSUP            $$ = new AstPin{FILELINE_OR_CRE($3), PINNUMINC(), "", $3}; }
+        //UNSUP | exprOrDataType/*expr*/ ':' expr ':' expr
+        //UNSUP          { MINTYPMAXDLYUNSUP($1); DEL($1); DEL($5);
+        //UNSUP            $$ = new AstPin{FILELINE_OR_CRE($3), PINNUMINC(), "", $3}; }
         ;
 
 cellpinItemE<pinp>:             // IEEE: named_port_connection + empty
diff --git a/test_regress/t/t_param_mintypmax.v b/test_regress/t/t_param_mintypmax.v
index dd9acdb5a..dfc793551 100644
--- a/test_regress/t/t_param_mintypmax.v
+++ b/test_regress/t/t_param_mintypmax.v
@@ -8,10 +8,23 @@ module t (/*AUTOARG*/);
 
    parameter MTM = (1:2:3);
 
+   sub sub ();
+   //UNSUP sub #(.MTM(10:20:30)) sub20name ();
+   //UNSUP sub #(.MTM(100:200)) sub200name ();
+   //UNSUP sub #(10:20:30) sub20pos ();
+   //UNSUP sub #(100:200) sub200pos ();
+
    initial begin
       if (MTM != 2) $stop;
+      //UNSUP if (sub20pos.MTM != 20) $stop;
+      //UNSUP if (sub200pos.MTM != 200) $stop;
+      //UNSUP if (sub20name.MTM != 20) $stop;
+      //UNSUP if (sub200name.MTM != 200) $stop;
       $write("*-* All Finished *-*\n");
       $finish;
    end
 
 endmodule
+
+module sub #(parameter MTM = (1:2:3)) ();
+endmodule