diff --git a/test/CodeGen/X86/2008-04-28-CyclicSchedUnit.ll b/test/CodeGen/X86/2008-04-28-CyclicSchedUnit.ll
index d105bcd5209..6613fafcce8 100644
--- a/test/CodeGen/X86/2008-04-28-CyclicSchedUnit.ll
+++ b/test/CodeGen/X86/2008-04-28-CyclicSchedUnit.ll
@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llc
+; RUN: llvm-as < %s | llc -march=x86
 
 define i64 @t(i64 %maxIdleDuration) nounwind  {
 	call void asm sideeffect "wrmsr", "{cx},A,~{dirflag},~{fpsr},~{flags}"( i32 416, i64 0 ) nounwind