diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index ddcebbc0eb..3c1539f1ad 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -371,6 +371,7 @@ INCLUDES = \
 	-DGTK_SYSCONFDIR=\"$(sysconfdir)\"		\
 	-DGTK_LOCALEDIR=\"$(gtklocaledir)\"		\
 	-I$(top_srcdir) -I../gdk			\
+	-I$(top_srcdir)/gdk				\
 	@GTK_DEBUG_FLAGS@				\
 	@GTK_XIM_FLAGS@					\
 	@GTK_LOCALE_FLAGS@				\