diff --git a/test/CodeGen/union.c b/test/CodeGen/union.c
index 4732938..4d32abd 100644
--- a/test/CodeGen/union.c
+++ b/test/CodeGen/union.c
@@ -1,6 +1,6 @@
 // RUN: clang %s -emit-llvm
 
-union {
+union u_tag {
   int a;
   float b;
 } u;
@@ -9,6 +9,10 @@
   u.b = 11;
 }
 
+float get_b(union u_tag *my_u) {
+  return my_u->b;
+}
+
 int f2( float __x ) { 
   union{ 
     float __f;