diff --git a/src/runtime/proc.go b/src/runtime/proc.go
index ed1aa1c194..035822216d 100644
--- a/src/runtime/proc.go
+++ b/src/runtime/proc.go
@@ -5225,7 +5225,9 @@ func runqputbatch(pp *p, q *gQueue, qsize int) {
 
 	atomic.StoreRel(&pp.runqtail, t)
 	if !q.empty() {
+		lock(&sched.lock)
 		globrunqputbatch(q, int32(qsize))
+		unlock(&sched.lock)
 	}
 }