diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 88dc6cce8ab..b412aa66c72 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -2608,5 +2608,6 @@ X86TargetLowering::isShuffleMaskLegal(SDOperand Mask, MVT::ValueType VT) const {
           X86::isSplatMask(Mask.Val) ||
           X86::isPSHUFDMask(Mask.Val) ||
           X86::isSHUFPMask(Mask.Val) ||
-          X86::isUNPCKLMask(Mask.Val));
+          X86::isUNPCKLMask(Mask.Val) ||
+          X86::isUNPCKHMask(Mask.Val);
 }