--- agg-2.5.old/include/agg_renderer_outline_aa.h
+++ agg-2.5/include/agg_renderer_outline_aa.h
@@ -1375,7 +1375,7 @@
         //---------------------------------------------------------------------
         void profile(const line_profile_aa& prof) { m_profile = &prof; }
         const line_profile_aa& profile() const { return *m_profile; }
-        line_profile_aa& profile() { return *m_profile; }
+//      line_profile_aa& profile() { return *m_profile; }
 
         //---------------------------------------------------------------------
         int subpixel_width() const { return m_profile->subpixel_width(); }