diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index 3823467c8..939acd8cf 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -1,9 +1,12 @@
 SUBDIRS = icons
 
 if TR_UNSTABLE
-GTK_EXTRA_CPPFLAGS=-DG_DISABLE_DEPRECATED -DGDK_PIXBUF_DISABLE_DEPRECATED -DGDK_DISABLE_DEPRECATED -DGTK_DISABLE_DEPRECATED -DPANGO_DISABLE_DEPRECATED -DG_DISABLE_SINGLE_INCLUDES -DGTK_DISABLE_SINGLE_INCLUDES
+GTK_EXTRA_CPPFLAGS=-DG_DISABLE_DEPRECATED -DGDK_PIXBUF_DISABLE_DEPRECATED -DGDK_DISABLE_DEPRECATED -DGTK_DISABLE_DEPRECATED -DPANGO_DISABLE_DEPRECATED
 endif
 
+# these should go in GTK_EXTRA_CPPFLAGS at some point, but not yet because it breaks libnotify's headers
+# -DG_DISABLE_SINGLE_INCLUDES -DGTK_DISABLE_SINGLE_INCLUDES
+
 sexy-marshal.h:	marshal.list
 	glib-genmarshal --prefix=sexy_marshal ./marshal.list --header > sexy-marshal.h