diff --git a/kernel/relay.c b/kernel/relay.c
index 078f733bebae7378a4054396bff8c404849b005c..5ad6cd2483ae2957ae8d7f1e2f60a8e88d0f720a 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -197,6 +197,7 @@ static struct rchan_buf *relay_create_buf(struct rchan *chan)
 static void relay_destroy_channel(struct kref *kref)
 {
 	struct rchan *chan = container_of(kref, struct rchan, kref);
+	free_percpu(chan->buf);
 	kfree(chan);
 }