diff --git a/sys/netinet/tcp_stacks/bbr.c b/sys/netinet/tcp_stacks/bbr.c
--- a/sys/netinet/tcp_stacks/bbr.c
+++ b/sys/netinet/tcp_stacks/bbr.c
@@ -3843,7 +3843,7 @@
 		else if (bbr->r_ctl.rc_delivered == 0)
 			lr2use = 1000;
 		else {
-			lr2use = bbr->r_ctl.rc_lost * 1000;
+			lr2use = (uint64_t)bbr->r_ctl.rc_lost * (uint64_t)1000;
 			lr2use /= bbr->r_ctl.rc_delivered;
 		}
 		lr2use += bbr->r_ctl.recovery_lr;