--- mod_shaper-orig.c	2007-01-08 11:33:01.000000000 -0600
+++ mod_shaper.c	2008-07-25 16:49:41.000000000 -0500
@@ -2175,8 +2175,8 @@
 static void shaper_startup_ev(const void *event_data, void *user_data) {
 
   /* Add a ShaperTable scrub timer. */
-  shaper_scrub_timer_id = add_timer(SHAPER_SCRUB_INTERVAL, -1, &shaper_module,
-    shaper_table_scrub_cb);
+  shaper_scrub_timer_id = add_timer(SHAPER_SCRUB_INTERVAL, -1, &shaper_module, 
+    shaper_table_scrub_cb, NULL);
 
   return;
 }