diff --git a/admin_manual/configuration_files/files_access_control.rst b/admin_manual/configuration_files/files_access_control.rst
index 087b84ad9..78a2af135 100644
--- a/admin_manual/configuration_files/files_access_control.rst
+++ b/admin_manual/configuration_files/files_access_control.rst
@@ -58,7 +58,8 @@ engine will block any attempt to upload the file. The safest way to define the r
 is to use a regular expression, as it will help you cover all the known media types
 used for the type of file you're trying to block.
 
-The following example prevents zip files from being uploaded.
+The following example prevents zip files from being uploaded by using the regular
+expression: ``/^application\/(zip|x-zip-compressed)$/i``
 
     .. figure:: images/files_access_control_block_mimetype.png
        :alt: Prevent upload based on mimetype