diff --git a/include/haproxy/stream_interface.h b/include/haproxy/stream_interface.h
index acc22e756..da07127ff 100644
--- a/include/haproxy/stream_interface.h
+++ b/include/haproxy/stream_interface.h
@@ -427,7 +427,7 @@ static inline struct conn_stream *si_alloc_cs(struct stream_interface *si, struc
 
 	si_release_endpoint(si);
 
-	cs = cs_new(conn, conn->target);
+	cs = cs_new(conn, (conn ? conn->target : NULL));
 	if (cs)
 		si_attach_cs(si, cs);