Index: kernel/generic/src/udebug/udebug_ops.c
===================================================================
--- kernel/generic/src/udebug/udebug_ops.c	(revision 96b02eb9b2f96f3843b8275c254c43a9cb6c8c88)
+++ kernel/generic/src/udebug/udebug_ops.c	(revision eff10e03264049c7392d3bedc24d0209a2d13af2)
@@ -196,6 +196,5 @@
 	/* Set udebug.active on all of the task's userspace threads. */
 	
-	link_t *cur;
-	for (cur = TASK->th_head.next; cur != &TASK->th_head; cur = cur->next) {
+	list_foreach(TASK->threads, cur) {
 		thread_t *thread = list_get_instance(cur, thread_t, th_link);
 		
@@ -390,6 +389,5 @@
 	
 	/* FIXME: make sure the thread isn't past debug shutdown... */
-	link_t *cur;
-	for (cur = TASK->th_head.next; cur != &TASK->th_head; cur = cur->next) {
+	list_foreach(TASK->threads, cur) {
 		thread_t *thread = list_get_instance(cur, thread_t, th_link);