--- a/gtksourceview/gtksourceutils.c
+++ b/gtksourceview/gtksourceutils.c
@@ -232,6 +232,8 @@
 							 NULL));
 	}
 
+	g_ptr_array_add (dirs, g_build_filename (DATADIR, GSV_DATA_SUBDIR, basename, NULL));
+
 	g_ptr_array_add (dirs, NULL);
 
 	return (gchar **) g_ptr_array_free (dirs, FALSE);
