diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 90326cb56f3..54063c58f15 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -5642,7 +5642,7 @@ X86TargetLowering::LowerBUILD_VECTORvXi1(SDValue Op, SelectionDAG &DAG) const {
       break;
     }
     if (cast<ConstantSDNode>(In)->getZExtValue())
-      Immediate |= (1 << idx);
+      Immediate |= (1ULL << idx);
   }
 
   if (AllContants) {