diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
index 1ba63c01808..b11ab0ec3ba 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
@@ -2522,7 +2522,7 @@ void SelectionDAGLowering::visitShuffleVector(User &I) {
       }
     }
 
-    if (RangeUse[0] == 0 && RangeUse[0] == 0) {
+    if (RangeUse[0] == 0 && RangeUse[1] == 0) {
       setValue(&I, DAG.getUNDEF(VT));  // Vectors are not used.
       return;
     }