diff --git a/contrib/nginx/zammad_ssl.conf b/contrib/nginx/zammad_ssl.conf
index ee4278caf..a8d18cfd6 100644
--- a/contrib/nginx/zammad_ssl.conf
+++ b/contrib/nginx/zammad_ssl.conf
@@ -94,6 +94,7 @@ server {
     proxy_set_header Connection "Upgrade";
     proxy_set_header CLIENT_IP $remote_addr;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto	$scheme;
     proxy_read_timeout 86400;
     proxy_pass http://zammad-websocket;
   }
@@ -102,6 +103,7 @@ server {
     proxy_set_header Host $http_host;
     proxy_set_header CLIENT_IP $remote_addr;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto	$scheme;
 
     # change this line in an SSO setup
     proxy_set_header X-Forwarded-User "";