diff --git a/src/http_fetch.c b/src/http_fetch.c
index 1f3fa4e0c..6e7ac9e2f 100644
--- a/src/http_fetch.c
+++ b/src/http_fetch.c
@@ -705,10 +705,13 @@ static int smp_fetch_url_ip(const struct arg *args, struct sample *smp, const ch
 	struct htx_sl *sl;
 	struct sockaddr_storage addr;
 
+	memset(&addr, 0, sizeof(addr));
+
 	if (!htx)
 		return 0;
 	sl = http_get_stline(htx);
-	url2sa(HTX_SL_REQ_UPTR(sl), HTX_SL_REQ_ULEN(sl), &addr, NULL);
+	if (url2sa(HTX_SL_REQ_UPTR(sl), HTX_SL_REQ_ULEN(sl), &addr, NULL) < 0)
+		return 0;
 
 	if (addr.ss_family != AF_INET)
 		return 0;
@@ -726,10 +729,13 @@ static int smp_fetch_url_port(const struct arg *args, struct sample *smp, const
 	struct htx_sl *sl;
 	struct sockaddr_storage addr;
 
+	memset(&addr, 0, sizeof(addr));
+
 	if (!htx)
 		return 0;
 	sl = http_get_stline(htx);
-	url2sa(HTX_SL_REQ_UPTR(sl), HTX_SL_REQ_ULEN(sl), &addr, NULL);
+	if (url2sa(HTX_SL_REQ_UPTR(sl), HTX_SL_REQ_ULEN(sl), &addr, NULL) < 0)
+		return 0;
 
 	if (addr.ss_family != AF_INET)
 		return 0;