diff --git a/Makefile.defs b/Makefile.defs
index 9b1307c..afa91be 100644
--- a/Makefile.defs
+++ b/Makefile.defs
@@ -169,6 +169,10 @@ networkmanagergui = network-manager-applet
 phonon_backend = phonon-backend-gstreamer
 mono[Mono.Cecil] = mono-core
 mono[Mono.Cecil.Mdb] = mono-core
+mono[gdk-sharp]= gtk-sharp2
+mono[gtk-sharp]= gtk-sharp2
+mono[glib-sharp]= gtk-sharp2
+mono[pango-sharp]= gtk-sharp2
 
 libxul.so = xulrunner
 libkorganizer.so.1 = korganizer