diff --git a/include/wx/univ/panel.h b/include/wx/univ/panel.h
index 9dbedf7f0c..2b0df97a96 100644
--- a/include/wx/univ/panel.h
+++ b/include/wx/univ/panel.h
@@ -29,8 +29,6 @@ public:
         Create(parent, winid, pos, size, style, name);
     }
 
-    virtual bool IsCanvasWindow() const { return true; }
-
 private:
     wxDECLARE_DYNAMIC_CLASS_NO_COPY(wxPanel);
 };
diff --git a/include/wx/univ/window.h b/include/wx/univ/window.h
index baab8504e0..b9bc7dbe88 100644
--- a/include/wx/univ/window.h
+++ b/include/wx/univ/window.h
@@ -140,10 +140,6 @@ public:
     // methods used by wxColourScheme to choose the colours for this window
     // --------------------------------------------------------------------
 
-    // return true if this is a panel/canvas window which contains other
-    // controls only
-    virtual bool IsCanvasWindow() const { return false; }
-
     // return true if this control can be highlighted when the mouse is over
     // it (the theme decides itself whether it is really highlighted or not)
     virtual bool CanBeHighlighted() const { return false; }