diff --git a/test/Headers/c89.c b/test/Headers/c89.c
index a4e92d3..4b17ba1 100644
--- a/test/Headers/c89.c
+++ b/test/Headers/c89.c
@@ -1,4 +1,4 @@
-// RUN: %clang -triple=i386-apple-darwin10 -fsyntax-only -verify -std=c89 %s
+// RUN: %clang -triple=i386-apple-darwin10 -msse3 -fsyntax-only -verify -std=c89 %s
 
 // PR6658
 #include <xmmintrin.h>