diff --git a/lib/Transforms/Utils/LoopUnroll.cpp b/lib/Transforms/Utils/LoopUnroll.cpp
index 960130e4ae4..a582731c644 100644
--- a/lib/Transforms/Utils/LoopUnroll.cpp
+++ b/lib/Transforms/Utils/LoopUnroll.cpp
@@ -472,7 +472,7 @@ bool llvm::UnrollLoop(Loop *L, unsigned Count, unsigned TripCount, bool Force,
       BasicBlock *New = CloneBasicBlock(*BB, VMap, "." + Twine(It));
       Header->getParent()->getBasicBlockList().push_back(New);
 
-      assert(*BB != Header || LI->getLoopFor(*BB) == L &&
+      assert((*BB != Header || LI->getLoopFor(*BB) == L) &&
              "Header should not be in a sub-loop");
       // Tell LI about New.
       const Loop *OldLoop = addClonedBlockToLoopInfo(*BB, New, LI, NewLoops);