diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 88490b3..2167523 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -2745,7 +2745,7 @@
         } else {
           StartIdx[Input] = (MinRange[Input]/MaskNumElts)*MaskNumElts;
           if (MaxRange[Input] - StartIdx[Input] < (int)MaskNumElts &&
-              StartIdx[Input] + MaskNumElts < SrcNumElts)
+              StartIdx[Input] + MaskNumElts <= SrcNumElts)
             RangeUse[Input] = 1; // Extract from a multiple of the mask length.
         }
       }