diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index abd7e747c..a5c966573 100755
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -98,7 +98,7 @@ __read_mostly int scheduler_running;
  * part of the period that we allow rt tasks to run in us.
  * default: 0.95s
  */
-int sysctl_sched_rt_runtime = 950000;
+int sysctl_sched_rt_runtime = -1;
 
 
 /*