diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index 625131738..d5929a9dd 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -3,7 +3,9 @@ CLEANFILES =
 SUBDIRS = icons
 
 if TR_UNSTABLE
-GTK_EXTRA_CPPFLAGS=-DG_DISABLE_DEPRECATED -DGDK_PIXBUF_DISABLE_DEPRECATED -DGDK_DISABLE_DEPRECATED -DGTK_DISABLE_DEPRECATED -DPANGO_DISABLE_DEPRECATED
+#FIXME: migrate from GtkUIManager to GtkBuilder in 2.90
+#GTK_EXTRA_CPPFLAGS=-DG_DISABLE_DEPRECATED -DGDK_PIXBUF_DISABLE_DEPRECATED -DGDK_DISABLE_DEPRECATED -DGTK_DISABLE_DEPRECATED -DPANGO_DISABLE_DEPRECATED
+GTK_EXTRA_CPPFLAGS=-DG_DISABLE_DEPRECATED -DGDK_PIXBUF_DISABLE_DEPRECATED -DGDK_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