--- a/ucx/Makefile	Wed May 13 21:12:41 2015 +0200
+++ b/ucx/Makefile	Tue May 19 10:46:32 2015 +0200
@@ -1,7 +1,7 @@
 #
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 #
-# Copyright 2013 Olaf Wintermann. All rights reserved.
+# Copyright 2015 Olaf Wintermann. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are met:
@@ -32,6 +32,7 @@
 SRC  = utils.c
 SRC += list.c
 SRC += map.c
+SRC += avl.c
 SRC += properties.c
 SRC += mempool.c
 SRC += string.c