diff --git a/include/wx/bookctrl.h b/include/wx/bookctrl.h
index 638f7c6436..f77f277ca6 100644
--- a/include/wx/bookctrl.h
+++ b/include/wx/bookctrl.h
@@ -339,7 +339,7 @@ protected:
     void OnSize(wxSizeEvent& event);
 
     // controller buddy if available, NULL otherwise (usually for native book controls like wxNotebook)
-    wxControl *m_bookctrl;
+    wxWindow *m_bookctrl;
 
     // Whether to shrink to fit current page
     bool m_fitToCurrentPage;