diff --git a/src/proto_http.c b/src/proto_http.c
index 39900de..a8a1728 100644
--- a/src/proto_http.c
+++ b/src/proto_http.c
@@ -440,6 +440,9 @@
 {
 	struct ist ret;
 
+	if (!txn->req.chn->buf.size)
+		return NULL;
+
 	ret = http_get_path(ist2(ci_head(txn->req.chn) + txn->req.sl.rq.u, txn->req.sl.rq.u_l));
 
 	return ret.ptr;