diff --git a/test/CodeGen/PowerPC/coalesce-ext.ll b/test/CodeGen/PowerPC/coalesce-ext.ll
index 08a2cc773fd..cc80f833079 100644
--- a/test/CodeGen/PowerPC/coalesce-ext.ll
+++ b/test/CodeGen/PowerPC/coalesce-ext.ll
@@ -1,4 +1,4 @@
-; RUN: llc -march=ppc64 < %s | FileCheck %s
+; RUN: llc -march=ppc64 -mtriple=powerpc64-apple-darwin < %s | FileCheck %s
 ; Check that the peephole optimizer knows about sext and zext instructions.
 ; CHECK: test1sext
 define i32 @test1sext(i64 %A, i64 %B, i32* %P, i64 *%P2) nounwind {