diff --git a/include/cppuhelper/access_control.hxx b/include/cppuhelper/access_control.hxx
index d0c382cdf179..24e619301629 100644
--- a/include/cppuhelper/access_control.hxx
+++ b/include/cppuhelper/access_control.hxx
@@ -57,6 +57,10 @@ public:
     */
     AccessControl( ::cppu::AccessControl const & ac );
 
+#if defined LIBO_INTERNAL_ONLY
+    AccessControl & operator =(AccessControl const &) = default; // avoid deprecation warnings
+#endif
+
     /** Clears the access controller reference being used.
     */
     void SAL_CALL clear()