diff --git a/src/corelib/kernel/qobjectdefs.h b/src/corelib/kernel/qobjectdefs.h
index e136fb61f62..5217b0d7e32 100644
--- a/src/corelib/kernel/qobjectdefs.h
+++ b/src/corelib/kernel/qobjectdefs.h
@@ -216,7 +216,7 @@ template <typename... Args> inline auto invokeMethodHelper(QMetaMethodReturnArgu
 }
 } // namespace QtPrivate
 
-template <typename T> inline QMetaMethodReturnArgument qReturnArg(T &&) = delete;
+template <typename T> void qReturnArg(const T &&) = delete;
 template <typename T> inline QMetaMethodReturnArgument qReturnArg(T &data)
 {
     return QtPrivate::Invoke::returnArgument(nullptr, data);