diff --git a/include/llvm/ADT/StringMap.h b/include/llvm/ADT/StringMap.h
index 1d5d227aea7..197230e1fac 100644
--- a/include/llvm/ADT/StringMap.h
+++ b/include/llvm/ADT/StringMap.h
@@ -457,7 +457,7 @@ private:
 template<typename ValueTy>
 class StringMapIterator : public StringMapConstIterator<ValueTy> {
 public:
-  StringMapIterator() : StringMapConstIterator<ValueTy>() {}
+  StringMapIterator() {}
   explicit StringMapIterator(StringMapEntryBase **Bucket,
                              bool NoAdvance = false)
     : StringMapConstIterator<ValueTy>(Bucket, NoAdvance) {