diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index bf3e38f..5a6ed1f 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -1662,8 +1662,9 @@
 	if (!p->signal)
 		return;
 
-	soft = p->signal->rlim[RLIMIT_RTTIME].rlim_cur;
-	hard = p->signal->rlim[RLIMIT_RTTIME].rlim_max;
+	/* max may change after cur was read, this will be fixed next tick */
+	soft = task_rlimit(p, RLIMIT_RTTIME);
+	hard = task_rlimit_max(p, RLIMIT_RTTIME);
 
 	if (soft != RLIM_INFINITY) {
 		unsigned long next;