diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c
index e27b11f18b7f..b43f1f110f87 100644
--- a/net/sctp/ulpevent.c
+++ b/net/sctp/ulpevent.c
@@ -206,7 +206,7 @@ struct sctp_ulpevent  *sctp_ulpevent_make_assoc_change(
 	 * This field is the total length of the notification data, including
 	 * the notification header.
 	 */
-	sac->sac_length = sizeof(struct sctp_assoc_change);
+	sac->sac_length = skb->len;
 
 	/* Socket Extensions for SCTP
 	 * 5.3.1.1 SCTP_ASSOC_CHANGE