diff --git a/test/Sema/enum.c b/test/Sema/enum.c
index 79a92c8..169c394 100644
--- a/test/Sema/enum.c
+++ b/test/Sema/enum.c
@@ -22,3 +22,9 @@
   return sizeof(enum e) ;
 }
 
+enum gccForwardEnumExtension ve; // expected-warning {{ISO C forbids forward references to 'enum' types}}
+
+int test2(int i)
+{
+  ve + i; // expected-error{{invalid operands to binary expression ('enum gccForwardEnumExtension' and 'int')}}
+}