diff --git a/src/filters.c b/src/filters.c
index ff78075..d446090 100644
--- a/src/filters.c
+++ b/src/filters.c
@@ -1190,6 +1190,7 @@
 		       unsigned int an_bit, int ret)
 {
 	int finst;
+	int status = 0;
 
 	if (ret < 0)
 		goto return_bad_req;
@@ -1211,21 +1212,23 @@
 	if (!(chn->flags & CF_ISRESP)) {
 		s->req.analysers &= AN_REQ_FLT_END;
 		finst = SF_FINST_R;
+		status = 400;
 		/* FIXME: incr counters */
 	}
 	else {
 		s->res.analysers &= AN_RES_FLT_END;
 		finst = SF_FINST_H;
+		status = 502;
 		/* FIXME: incr counters */
 	}
 
 	if (s->txn) {
 		/* Do not do that when we are waiting for the next request */
-		if (s->txn->status)
+		if (s->txn->status > 0)
 			http_reply_and_close(s, s->txn->status, NULL);
 		else {
-			s->txn->status = 400;
-			http_reply_and_close(s, 400, http_error_message(s));
+			s->txn->status = status;
+			http_reply_and_close(s, status, http_error_message(s));
 		}
 	}