diff --git a/kernel/sched.c b/kernel/sched.c
index 908670a..6a43c89 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1922,7 +1922,7 @@
 		on_rq = p->se.on_rq;
 		ncsw = 0;
 		if (!match_state || p->state == match_state)
-			ncsw = p->nvcsw ?: 1;
+			ncsw = p->nvcsw | LONG_MIN; /* sets MSB */
 		task_rq_unlock(rq, &flags);
 
 		/*