diff --git a/src/filters.c b/src/filters.c
index c4601febe..e27505040 100644
--- a/src/filters.c
+++ b/src/filters.c
@@ -611,8 +611,9 @@ flt_http_payload(struct stream *s, struct http_msg *msg, unsigned int len)
 	struct filter *filter;
 	unsigned long long *strm_off = &FLT_STRM_OFF(s, msg->chn);
 	unsigned int out = co_data(msg->chn);
-	int ret = 0, data = len - out;
+	int ret, data;
 
+	ret = data = len - out;
 	DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_FLT_ANA, s, s->txn, msg);
 	list_for_each_entry(filter, &strm_flt(s)->filters, list) {
 		/* Call "data" filters only */
@@ -875,8 +876,9 @@ flt_tcp_payload(struct stream *s, struct channel *chn, unsigned int len)
 	struct filter *filter;
 	unsigned long long *strm_off = &FLT_STRM_OFF(s, chn);
 	unsigned int out = co_data(chn);
-	int ret = 0, data = len - out;
+	int ret, data;
 
+	ret = data = len - out;
 	DBG_TRACE_ENTER(STRM_EV_TCP_ANA|STRM_EV_FLT_ANA, s);
 	list_for_each_entry(filter, &strm_flt(s)->filters, list) {
 		/* Call "data" filters only */