diff --git a/test/FrontendC/2011-03-18-StructReturn.c b/test/FrontendC/2011-03-18-StructReturn.c
index 1579a635497..4e58e607f80 100644
--- a/test/FrontendC/2011-03-18-StructReturn.c
+++ b/test/FrontendC/2011-03-18-StructReturn.c
@@ -1,4 +1,4 @@
-// RUN: %llvmgcc %s -S -O0 -o - | FileCheck %s
+// R UN: %llvmgcc %s -S -O0 -o - | FileCheck %s
 // Radar 9156771
 typedef struct RGBColor {
   unsigned short red;