diff --git a/400_xowa/src/gplx/xowa/apps/servers/http/Http_server_wkr.java b/400_xowa/src/gplx/xowa/apps/servers/http/Http_server_wkr.java
index 08b16410e..361b6c08a 100644
--- a/400_xowa/src/gplx/xowa/apps/servers/http/Http_server_wkr.java
+++ b/400_xowa/src/gplx/xowa/apps/servers/http/Http_server_wkr.java
@@ -192,6 +192,7 @@ class Xosrv_http_wkr_ {
 				, Rsp__location
 				, redirect
 				, Byte_ascii.Nl_bry
+				, Byte_ascii.Nl_bry // proxy servers like nginx require 2 line breaks; ISSUE#:600; DATE:2019-11-05
 				)
 			);
 		} catch (Exception err) {