Index: uspace/lib/hound/src/protocol.c
===================================================================
--- uspace/lib/hound/src/protocol.c	(revision 984a9ba2fa05c490a7066737655ed19130c714e8)
+++ uspace/lib/hound/src/protocol.c	(revision 99d3123e7ab9ecf412fde9af4e2b084aac7c5dc1)
@@ -750,7 +750,8 @@
  * @return Error code.
  */
-errno_t hound_server_set_device_change_callback(dev_change_callback_t cb)
-{
-	return loc_register_cat_change_cb(cb);
+errno_t hound_server_set_device_change_callback(dev_change_callback_t cb,
+    void *arg)
+{
+	return loc_register_cat_change_cb(cb, arg);
 }