diff --git a/src/hlua.c b/src/hlua.c
index 346722675..184c1e780 100644
--- a/src/hlua.c
+++ b/src/hlua.c
@@ -7409,6 +7409,7 @@ __LJMP static int hlua_httpclient_send(lua_State *L, enum http_meth_t meth)
 
 	hlua_hc->sent = 0;
 
+	istfree(&hlua_hc->hc->req.url);
 	hlua_hc->hc->req.url = istdup(ist(url_str));
 	hlua_hc->hc->req.meth = meth;