diff --git a/test/MC/Disassembler/simple-tests.txt b/test/MC/Disassembler/simple-tests.txt
index 1152ad493d1..1e3249f8268 100644
--- a/test/MC/Disassembler/simple-tests.txt
+++ b/test/MC/Disassembler/simple-tests.txt
@@ -1,4 +1,4 @@
-# RUN: llvm-mc --disassemble %s | FileCheck %s
+# RUN: llvm-mc --disassemble %s -triple=x86_64-apple-darwin9 | FileCheck %s
 
 # CHECK: int	$33
 0xCD 0x21