diff --git a/admin_manual/installation/nginx_configuration.rst b/admin_manual/installation/nginx_configuration.rst
index 4ac7708d7..414dd5720 100644
--- a/admin_manual/installation/nginx_configuration.rst
+++ b/admin_manual/installation/nginx_configuration.rst
@@ -36,6 +36,9 @@ Nginx Configuration
     client_max_body_size 10G;             
     fastcgi_buffers 64 4K;
 
+    # Disable gzip to avoid the removal of the ETag header
+    gzip off;
+
     rewrite ^/caldav(.*)$ /remote.php/caldav$1 redirect;
     rewrite ^/carddav(.*)$ /remote.php/carddav$1 redirect;
     rewrite ^/webdav(.*)$ /remote.php/webdav$1 redirect;