diff --git a/llvm/include/llvm/ADT/MapVector.h b/llvm/include/llvm/ADT/MapVector.h
index 0727383310a0..1331b15b2d29 100644
--- a/llvm/include/llvm/ADT/MapVector.h
+++ b/llvm/include/llvm/ADT/MapVector.h
@@ -185,11 +185,9 @@ void MapVector<KeyT, ValueT, MapType, VectorType>::remove_if(Function Pred) {
 /// \brief A MapVector that performs no allocations if smaller than a certain
 /// size.
 template <typename KeyT, typename ValueT, unsigned N>
-class SmallMapVector
-    : public MapVector<KeyT, ValueT, SmallDenseMap<KeyT, unsigned, N>,
-                       SmallVector<std::pair<KeyT, ValueT>, N>> {
-public:
-  SmallMapVector() {}
+struct SmallMapVector
+    : MapVector<KeyT, ValueT, SmallDenseMap<KeyT, unsigned, N>,
+                SmallVector<std::pair<KeyT, ValueT>, N>> {
 };
 
 } // end namespace llvm