diff --git a/kernel/sched.c b/kernel/sched.c
index ac3f5cc..b650667 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -815,7 +815,8 @@
 	}
 #endif
 
-	p->prio = recalc_task_prio(p, now);
+	if (!rt_task(p))
+		p->prio = recalc_task_prio(p, now);
 
 	/*
 	 * This checks to make sure it's not an uninterruptible task