diff --git a/clang/test/CodeGen/x86_64-arguments.c b/clang/test/CodeGen/x86_64-arguments.c
index 28e87889126f..2b709886aac7 100644
--- a/clang/test/CodeGen/x86_64-arguments.c
+++ b/clang/test/CodeGen/x86_64-arguments.c
@@ -5,7 +5,8 @@
 // RUN: grep 'define float @f3()' %t &&
 // RUN: grep 'define double @f4()' %t &&
 // RUN: grep 'define x86_fp80 @f5()' %t &&
-// RUN: grep 'define void @f6(i8 signext %a0, i16 signext %a1, i32 %a2, i64 %a3, i8\* %a4)' %t
+// RUN: grep 'define void @f6(i8 signext %a0, i16 signext %a1, i32 %a2, i64 %a3, i8\* %a4)' %t &&
+// RUN: grep 'define void @f7(i32 %a0)' %t
 
 char f0(void) {
 }
@@ -27,3 +28,8 @@ long double f5(void) {
 
 void f6(char a0, short a1, int a2, long long a3, void *a4) {
 }
+
+typedef enum { A, B, C } E;
+
+void f7(E a0) {
+}
\ No newline at end of file