diff --git a/stl/inc/vector b/stl/inc/vector
index 8286166d3d2..c74ef4b0503 100644
--- a/stl/inc/vector
+++ b/stl/inc/vector
@@ -2380,7 +2380,8 @@ struct _Wrap_alloc { // TRANSITION, ABI compat, preserves symbol names of vector
 };
 
 template <class _Alvbase_wrapped>
-class _Vb_iter_base : public _Iterator_base {
+class _Vb_iter_base : 
+public _Iterator_base {
     // store information common to reference and iterators
 public:
     using _Alvbase         = typename _Alvbase_wrapped::_Alloc;