diff --git a/test/CFrontend/2002-08-02-UnionTest.c b/test/CFrontend/2002-08-02-UnionTest.c
new file mode 100644
index 00000000000..25bf1570561
--- /dev/null
+++ b/test/CFrontend/2002-08-02-UnionTest.c
@@ -0,0 +1,17 @@
+/* In this testcase, the return value of foo() is being promotedto a register
+ * which breaks stuff
+ */
+#include <stdio.h>
+
+union X { char X; void *B; int a, b, c, d;};
+
+union X foo() {
+	union X Global;
+        Global.B = (void*)123;   /* Interesting part */
+	return Global;
+}
+
+void main() {
+	union X test = foo();
+	printf("0x%p", test.B);
+}