diff --git a/contrib/nginx/zammad.conf b/contrib/nginx/zammad.conf
index 7bb4fcc25..279d35f51 100644
--- a/contrib/nginx/zammad.conf
+++ b/contrib/nginx/zammad.conf
@@ -33,6 +33,7 @@ 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;
     }
@@ -41,6 +42,7 @@ 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;
         proxy_read_timeout 180;
         proxy_pass http://zammad;
 
diff --git a/contrib/nginx/zammad_ssl.conf b/contrib/nginx/zammad_ssl.conf
index 248790af3..de55f36ed 100644
--- a/contrib/nginx/zammad_ssl.conf
+++ b/contrib/nginx/zammad_ssl.conf
@@ -124,6 +124,7 @@ 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;
     }
@@ -132,6 +133,7 @@ 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;
         proxy_read_timeout 180;
         proxy_pass http://zammad;