diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 5a317f62a516..2cfe8932d5db 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4826,6 +4826,7 @@ int sched_fork(u64 clone_flags, struct task_struct *p)
 			p->policy = SCHED_NORMAL;
 			p->static_prio = NICE_TO_PRIO(0);
 			p->rt_priority = 0;
+			p->timer_slack_ns = p->default_timer_slack_ns;
 		} else if (PRIO_TO_NICE(p->static_prio) < 0)
 			p->static_prio = NICE_TO_PRIO(0);