diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 73bdeb2b6c62..7fb08a694917 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -1115,7 +1115,8 @@ sctp_disposition_t sctp_sf_backbeat_8_3(const struct sctp_endpoint *ep,
 		return sctp_sf_pdiscard(ep, asoc, type, arg, commands);
 
 	/* Make sure that the HEARTBEAT-ACK chunk has a valid length.  */
-	if (!sctp_chunk_length_valid(chunk, sizeof(sctp_heartbeat_chunk_t)))
+	if (!sctp_chunk_length_valid(chunk, sizeof(sctp_chunkhdr_t) +
+					    sizeof(sctp_sender_hb_info_t)))
 		return sctp_sf_violation_chunklen(ep, asoc, type, arg,
 						  commands);