diff --git a/go/types.cc b/go/types.cc
index 5a45bb2..6d0c9a3 100644
--- a/go/types.cc
+++ b/go/types.cc
@@ -10259,6 +10259,15 @@
 	  break;
 
 	case Type::TYPE_NAMED:
+          if (type->named_type() == type->base()->named_type())
+            {
+              this->found_ = true;
+              return TRAVERSE_EXIT;
+            }
+          else
+	    go_assert(saw_errors());
+	break;
+
 	case Type::TYPE_FORWARD:
 	  go_assert(saw_errors());
 	  break;