diff --git a/test/CodeGen/union.c b/test/CodeGen/union.c
index b47e697..1e4346d 100644
--- a/test/CodeGen/union.c
+++ b/test/CodeGen/union.c
@@ -31,3 +31,8 @@
 union S65 { enum E9 a:62; } ; union S65 s65;
 void fS65() { enum E9 e = s65.a; } 
 
+typedef union{
+  unsigned char x[65536];
+} q;
+int qfunc() {q buf; unsigned char* x = buf.x;}
+