diff --git a/test/CodeGen/2008-02-08-bitfield-bug.c b/test/CodeGen/2008-02-08-bitfield-bug.c
index 1a9c266..3818e96 100644
--- a/test/CodeGen/2008-02-08-bitfield-bug.c
+++ b/test/CodeGen/2008-02-08-bitfield-bug.c
@@ -1,4 +1,4 @@
-// RUN: clang %s -emit-llvm
+// RUN: clang %s -emit-llvm -o %t
 
 struct test {
   unsigned a:1;