diff --git a/sys/netinet/sctp_auth.c b/sys/netinet/sctp_auth.c
index 5a5b7880fd3..d379dd0a143 100644
--- a/sys/netinet/sctp_auth.c
+++ b/sys/netinet/sctp_auth.c
@@ -1706,7 +1706,7 @@ sctp_handle_auth(struct sctp_tcb *stcb, struct sctp_auth_chunk *auth,
 	    m, offset, computed_digest);
 
 	/* compare the computed digest with the one in the AUTH chunk */
-	if (memcmp(digest, computed_digest, digestlen) != 0) {
+	if (timingsafe_bcmp(digest, computed_digest, digestlen) != 0) {
 		SCTP_STAT_INCR(sctps_recvauthfailed);
 		SCTPDBG(SCTP_DEBUG_AUTH1,
 		    "SCTP Auth: HMAC digest check failed\n");
diff --git a/sys/netinet/sctp_input.c b/sys/netinet/sctp_input.c
index 3a7d93833a0..86656a7f7eb 100644
--- a/sys/netinet/sctp_input.c
+++ b/sys/netinet/sctp_input.c
@@ -2554,7 +2554,7 @@ sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
 		return (NULL);
 	}
 	/* compare the received digest with the computed digest */
-	if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
+	if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
 		/* try the old cookie? */
 		if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
 		    (ep->current_secret_number != ep->last_secret_number)) {
@@ -2563,7 +2563,7 @@ sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
 			    (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
 			    SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
 			/* compare */
-			if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
+			if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
 				cookie_ok = 1;
 		}
 	} else {