diff --git a/include/wx/generic/dcpsg.h b/include/wx/generic/dcpsg.h
index cf9041546a..a9f6822be2 100644
--- a/include/wx/generic/dcpsg.h
+++ b/include/wx/generic/dcpsg.h
@@ -73,6 +73,7 @@ public:
     virtual void SetLogicalOrigin(wxCoord x, wxCoord y);
     virtual void SetDeviceOrigin(wxCoord x, wxCoord y);
 #endif
+    virtual void ComputeScaleAndOrigin();
 
     void SetBackgroundMode(int WXUNUSED(mode)) { }
     void SetPalette(const wxPalette& WXUNUSED(palette)) { }