--- Makefile.OCaml.orig	Sun Sep 28 18:48:05 2014
+++ Makefile.OCaml	Fri Jan  9 15:23:59 2015
@@ -299,7 +299,7 @@ endif
 
 # Gtk2 GUI
 ifeq ($(UISTYLE), gtk2)
-  CAMLFLAGS+=-I +lablgtk2
+  CAMLFLAGS+=-I +site-lib/lablgtk2
   OCAMLOBJS+=pixmaps.cmo uigtk2.cmo linkgtk2.cmo
   OCAMLLIBS+=lablgtk.cma
 endif