diff --git a/test/CodeGen/X86/20090313-signext.ll b/test/CodeGen/X86/20090313-signext.ll
index d41b2454863..6681682164c 100644
--- a/test/CodeGen/X86/20090313-signext.ll
+++ b/test/CodeGen/X86/20090313-signext.ll
@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llc -march=x86-64 > %t
+; RUN: llvm-as < %s | llc -march=x86-64 -mtriple=*-*-linux > %t
 ; RUN: grep {movswl	%ax, %edi} %t
 ; RUN: grep {movw	x(%rip), %ax} %t