diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 16b8dbb451f..96fa0e9eb16 100644
--- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -1935,6 +1935,7 @@ void LoopStrengthReduce::OptimizeIVType(Loop *L) {
 
     ConstantInt *CInit = dyn_cast<ConstantInt>(PHI->getIncomingValue(Entry));
     if (!CInit) return;
+    if (!CInit->isZero()) return;
 
     bool signedInit = CInit->getValue().isNegative();