From 242706ea34b3df24804c0adea93ed399167405cd Mon Sep 17 00:00:00 2001
From: yhirose <yuji.hirose.bug@gmail.com>
Date: Thu, 31 Dec 2020 18:14:05 -0500
Subject: [PATCH] Fix #820

---
 httplib.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/httplib.h b/httplib.h
index 9b76290..68a8a58 100644
--- a/httplib.h
+++ b/httplib.h
@@ -4235,7 +4235,10 @@ inline bool Server::write_response_core(Stream &strm, bool close_connection,
                                         bool need_apply_ranges) {
   assert(res.status != -1);
 
-  if (400 <= res.status && error_handler_) { error_handler_(req, res); }
+  if (400 <= res.status && error_handler_) {
+    error_handler_(req, res);
+    need_apply_ranges = true;
+  }
 
   std::string content_type;
   std::string boundary;