diff --git a/master.html b/master.html
index 19441ad6..d395ed02 100644
--- a/master.html
+++ b/master.html
@@ -450,6 +450,7 @@ user2:password2
     proxy_pass        http://localhost:5232/; # The / is important!
     proxy_set_header  X-Script-Name /radicale;
     proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header  Host $http_host;
     proxy_pass_header Authorization;
 }
 </code></pre>
@@ -472,6 +473,7 @@ user2:password2
     proxy_set_header     X-Script-Name /radicale;
     proxy_set_header     X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header     X-Remote-User $remote_user;
+    proxy_set_header     Host $http_host;
     auth_basic           "Radicale - Password Required";
     auth_basic_user_file /etc/nginx/htpasswd;
 }