diff --git a/src/frontend.c b/src/frontend.c
index 12dc2c8..35c3ef3 100644
--- a/src/frontend.c
+++ b/src/frontend.c
@@ -54,6 +54,7 @@
 
 	if (get_original_dst(s->si[0].fd, (struct sockaddr_in *)&s->si[0].addr.to, &namelen) == -1)
 		getsockname(s->si[0].fd, (struct sockaddr *)&s->si[0].addr.to, &namelen);
+	s->si[0].flags |= SI_FL_TO_SET;
 	s->flags |= SN_FRT_ADDR_SET;
 }