diff --git a/etc/nginx/coolwsd.conf b/etc/nginx/coolwsd.conf
index 6d0814ea516d..0e60c3f5f01a 100644
--- a/etc/nginx/coolwsd.conf
+++ b/etc/nginx/coolwsd.conf
@@ -1,19 +1,19 @@
     # static files
     location ^~ /browser {
         proxy_pass http://localhost:9980;
-        proxy_set_header Host $http_host;
+        proxy_set_header Host $host;
     }
 
     # WOPI discovery URL
     location ^~ /hosting/discovery {
         proxy_pass http://localhost:9980;
-        proxy_set_header Host $http_host;
+        proxy_set_header Host $host;
     }
 
     # Capabilities
     location ^~ /hosting/capabilities {
         proxy_pass http://localhost:9980;
-        proxy_set_header Host $http_host;
+        proxy_set_header Host $host;
     }
 
     # main websocket
@@ -21,7 +21,7 @@
         proxy_pass http://localhost:9980;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection "Upgrade";
-        proxy_set_header Host $http_host;
+        proxy_set_header Host $host;
         proxy_read_timeout 36000s;
     }
 
@@ -29,7 +29,7 @@
     # we accept 'lool' to be backward compatible
     location ~ ^/(c|l)ool {
         proxy_pass http://localhost:9980;
-        proxy_set_header Host $http_host;
+        proxy_set_header Host $host;
     }
 
     # Admin Console websocket
@@ -37,6 +37,6 @@
         proxy_pass http://localhost:9980;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection "Upgrade";
-        proxy_set_header Host $http_host;
+        proxy_set_header Host $host;
         proxy_read_timeout 36000s;
     }