diff --git a/lib/Transforms/InstCombine/InstCombineWorklist.h b/lib/Transforms/InstCombine/InstCombineWorklist.h
index 19959c0dcda..11095585b7b 100644
--- a/lib/Transforms/InstCombine/InstCombineWorklist.h
+++ b/lib/Transforms/InstCombine/InstCombineWorklist.h
@@ -74,8 +74,7 @@ public:
   }
 
   Instruction *RemoveOne() {
-    Instruction *I = Worklist.back();
-    Worklist.pop_back();
+    Instruction *I = Worklist.pop_back_val();
     WorklistMap.erase(I);
     return I;
   }