diff --git a/include/proto/server.h b/include/proto/server.h
index 5a2fcc9192..0844e8aeb8 100644
--- a/include/proto/server.h
+++ b/include/proto/server.h
@@ -261,7 +261,7 @@ static inline int srv_add_to_idle_list(struct server *srv, struct connection *co
 			_HA_ATOMIC_SUB(&srv->curr_idle_conns, 1);
 			return 0;
 		}
-		LIST_DEL(&conn->list);
+		LIST_DEL_INIT(&conn->list);
 		MT_LIST_ADDQ(&srv->idle_orphan_conns[tid], (struct mt_list *)&conn->list);
 		srv->curr_idle_thr[tid]++;