--- include/dychart.h.gtk	2010-02-07 11:38:16.000000000 +0000
+++ include/dychart.h	2010-02-07 11:38:44.000000000 +0000
@@ -202,7 +202,9 @@
 
 #ifdef __WXGTK__
 #ifdef ocpnUSE_GTK_OPTIMIZE
-    #include <gtk/gtk.h>
+#define GSocket GlibGSocket
+#include <gtk/gtk.h>
+#undef GSocket
 #endif
 #endif