diff --git a/sys/netinet/sctp_input.c b/sys/netinet/sctp_input.c
index 1525a0ad35c..5e9a1f9f30e 100644
--- a/sys/netinet/sctp_input.c
+++ b/sys/netinet/sctp_input.c
@@ -5515,6 +5515,11 @@ process_control_chunks:
 					*offset = length;
 					return (NULL);
 				}
+				/*
+				 * For sending a SACK this looks like DATA
+				 * chunks.
+				 */
+				stcb->asoc.last_data_chunk_from = stcb->asoc.last_control_chunk_from;
 				sctp_handle_forward_tsn(stcb,
 				    (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
 				if (abort_flag) {