diff --git a/admin_manual/configuration_files/big_file_upload_configuration.rst b/admin_manual/configuration_files/big_file_upload_configuration.rst
index f83a15ba4..0c61a9ed9 100644
--- a/admin_manual/configuration_files/big_file_upload_configuration.rst
+++ b/admin_manual/configuration_files/big_file_upload_configuration.rst
@@ -92,12 +92,6 @@ nginx
 * `fastcgi_read_timeout <https://nginx.org/en/docs/http/ngx_http_fastcgi_module.html#fastcgi_read_timeout>`_
 * `client_body_temp_path <https://nginx.org/en/docs/http/ngx_http_core_module.html#client_body_temp_path>`_
 
-Since nginx 1.7.11 a new config option `fastcgi_request_buffering
-<https://nginx.org/en/docs/http/ngx_http_fastcgi_module.html#fastcgi_request_buffering>`_
-is available. Setting this option to ``fastcgi_request_buffering off;`` in your nginx config
-might help with timeouts during the upload. Furthermore it helps if you're running out of
-disc space on the tmp partition of your system.
-
 .. note:: Make sure that ``client_body_temp_path`` points to a partition with
    adequate space for your upload file size, and on the same partition as
    the ``upload_tmp_dir`` or ``tempdirectory`` (see below). For optimal
diff --git a/admin_manual/installation/nginx-root.conf.sample b/admin_manual/installation/nginx-root.conf.sample
index 3ae568a3b..6c7a6c281 100644
--- a/admin_manual/installation/nginx-root.conf.sample
+++ b/admin_manual/installation/nginx-root.conf.sample
@@ -159,7 +159,7 @@ server {
         fastcgi_pass php-handler;
 
         fastcgi_intercept_errors on;
-        fastcgi_request_buffering off;
+        fastcgi_request_buffering on;                   # Required as PHP-FPM does not support chunked transfer encoding and requires a valid ContentLength header.
 
         fastcgi_max_temp_file_size 0;
     }
diff --git a/admin_manual/installation/nginx-subdir.conf.sample b/admin_manual/installation/nginx-subdir.conf.sample
index 3b731ff0e..c1b63cc57 100644
--- a/admin_manual/installation/nginx-subdir.conf.sample
+++ b/admin_manual/installation/nginx-subdir.conf.sample
@@ -158,7 +158,7 @@ server {
             fastcgi_pass php-handler;
 
             fastcgi_intercept_errors on;
-            fastcgi_request_buffering off;
+            fastcgi_request_buffering on;                   # Required as PHP-FPM does not support chunked transfer encoding and requires a valid ContentLength header.
 
             fastcgi_max_temp_file_size 0;
         }