diff --git a/httplib.h b/httplib.h
index e14bc7d..ce15f40 100644
--- a/httplib.h
+++ b/httplib.h
@@ -6262,15 +6262,10 @@ Server::process_request(Stream &strm, bool close_connection,
   if (!line_reader.getline()) { return false; }
 
   Request req;
+
   Response res;
-
   res.version = "HTTP/1.1";
-
-  for (const auto &header : default_headers_) {
-    if (res.headers.find(header.first) == res.headers.end()) {
-      res.headers.insert(header);
-    }
-  }
+  res.headers = default_headers_;
 
 #ifdef _WIN32
   // TODO: Increase FD_SETSIZE statically (libzmq), dynamically (MySQL).