diff --git a/src/widgets/styles/qstylesheetstyle_p.h b/src/widgets/styles/qstylesheetstyle_p.h
index 81c532bf6a..3c3503b964 100644
--- a/src/widgets/styles/qstylesheetstyle_p.h
+++ b/src/widgets/styles/qstylesheetstyle_p.h
@@ -214,7 +214,7 @@ public:
 };
 template <typename T>
 class QTypeInfo<QStyleSheetStyleCaches::Tampered<T>>
-    : QTypeInfoMerger<QStyleSheetStyleCaches::Tampered<T>, T> {};
+    : public QTypeInfoMerger<QStyleSheetStyleCaches::Tampered<T>, T> {};
 
 
 // Returns a QStyleSheet from the given style.