diff --git a/test/CodeGen/X86/domain-reassignment-test.ll b/test/CodeGen/X86/domain-reassignment-test.ll
index 6285537df74..af7aca67c8f 100644
--- a/test/CodeGen/X86/domain-reassignment-test.ll
+++ b/test/CodeGen/X86/domain-reassignment-test.ll
@@ -1,5 +1,5 @@
 ; RUN: llc -mcpu=skylake-avx512 -mtriple=x86_64-unknown-linux-gnu %s -o - | FileCheck %s
-; RUN: llc -mcpu=skylake-avx512 -mtriple=x86_64-unknown-linux-gnu %s -o - | llvm-mc
+; RUN: llc -mcpu=skylake-avx512 -mtriple=x86_64-unknown-linux-gnu %s -o - | llvm-mc -triple=x86_64-unknown-linux-gnu
 
 ; Check that the X86 domain reassignment pass doesn't introduce an illegal
 ; test instruction. See PR37396