diff --git a/samples/render/renddll.cpp b/samples/render/renddll.cpp
index b3afaf8336..51983bd6f0 100644
--- a/samples/render/renddll.cpp
+++ b/samples/render/renddll.cpp
@@ -73,6 +73,16 @@ public:
     {
     }
 
+    // draw a dropdown arrow
+    //
+    // flags may use wxCONTROL_PRESSED and wxCONTROL_CURRENT
+    virtual void DrawDropArrow(wxWindow *win,
+                               wxDC& dc,
+                               const wxRect& rect,
+                               int flags = 0)
+    {
+    }
+
     // get the splitter parameters: the x field of the returned point is the
     // sash width and the y field is the border width
     virtual wxSplitterRenderParams GetSplitterParams(const wxWindow *win)