diff --git a/sys/netinet/sctp_pcb.c b/sys/netinet/sctp_pcb.c
index e571f80e472a..6ccd4ddf96b7 100644
--- a/sys/netinet/sctp_pcb.c
+++ b/sys/netinet/sctp_pcb.c
@@ -4542,7 +4542,7 @@ sctp_add_vtag_to_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
 
 	SCTP_INP_INFO_WLOCK_ASSERT();
 	(void)SCTP_GETTIME_TIMEVAL(&now);
-	time = now.tv_sec + SCTP_BASE_SYSCTL(sctp_vtag_time_wait);
+	time = (uint32_t)now.tv_sec + SCTP_BASE_SYSCTL(sctp_vtag_time_wait);
 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 	set = false;
 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {