diff --git a/llvm/test/CFrontend/2008-01-21-PackedStructField.c b/llvm/test/CFrontend/2008-01-21-PackedStructField.c
index c87e65b38b82..9cc1731063f5 100644
--- a/llvm/test/CFrontend/2008-01-21-PackedStructField.c
+++ b/llvm/test/CFrontend/2008-01-21-PackedStructField.c
@@ -3,3 +3,16 @@
 struct X { long double b; unsigned char c; double __attribute__((packed)) d; };
 struct X x = { 3.0L, 5, 3.0 };
 
+
+struct S2504 {
+  int e:17;
+    __attribute__((packed)) unsigned long long int f; 
+} ;
+int fails;
+ extern struct S2504 s2504; 
+void check2504va (int z) { 
+  struct S2504 arg, *p;
+  long long int i = 0; 
+  arg.f = i;
+}
+