diff --git a/pkg/scheduler/framework/plugins/nodeunschedulable/node_unschedulable.go b/pkg/scheduler/framework/plugins/nodeunschedulable/node_unschedulable.go
index ffc85e32c21..560630de029 100644
--- a/pkg/scheduler/framework/plugins/nodeunschedulable/node_unschedulable.go
+++ b/pkg/scheduler/framework/plugins/nodeunschedulable/node_unschedulable.go
@@ -25,8 +25,8 @@ import (
 	framework "k8s.io/kubernetes/pkg/scheduler/framework/v1alpha1"
 )
 
-// NodeUnschedulable is a plugin that priorities nodes according to the node annotation
-// "scheduler.alpha.kubernetes.io/preferAvoidPods".
+// NodeUnschedulable plugin filters nodes that set node.Spec.Unschedulable=true unless
+// the pod tolerates {key=node.kubernetes.io/unschedulable, effect:NoSchedule} taint.
 type NodeUnschedulable struct {
 }