diff --git a/interface/wx/propdlg.h b/interface/wx/propdlg.h
index 4349afacc3..a55804eaea 100644
--- a/interface/wx/propdlg.h
+++ b/interface/wx/propdlg.h
@@ -182,13 +182,6 @@ public:
     */
     void SetBookCtrl(wxBookCtrlBase* bookCtrl);
 
-    /**
-        Sets the inner sizer that contains the book control and button sizer.
-
-        You will normally not need to use this.
-    */
-    void SetInnerSizer(wxSizer* sizer);
-
     /**
         You can customize the look and feel of the dialog by setting the sheet style.
         It is a bit list of the ::wxPropertySheetDialogFlags values.