diff --git a/admin_manual/installation/source_installation.rst b/admin_manual/installation/source_installation.rst
index a8f0d6489..a81be11a9 100644
--- a/admin_manual/installation/source_installation.rst
+++ b/admin_manual/installation/source_installation.rst
@@ -189,7 +189,7 @@ For hardened security we  highly recommend setting the permissions on your ownCl
 as possible. These commands should be executed immediately after the initial installation::
   
     chown -R root:root /path/to/owncloud/
-    chmod -R 755 /path/to/owncloud/
+    chmod -R 0755 /path/to/owncloud/
     chown <http-user>:<http-user> /path/to/owncloud/config/
     chmod 0750 /path/to/owncloud/config/
     chown <http-user>:<http-user> /path/to/owncloud/config/config.php
@@ -197,9 +197,9 @@ as possible. These commands should be executed immediately after the initial ins
     chown -R <http-user>:<http-user> /path/to/owncloud/data/
     chmod -R 750 /path/to/owncloud/data
     chown root:root /path/to/owncloud/data/.htaccess
-    chmod 755 /path/to/owncloud/data/.htaccess
+    chmod 0755 /path/to/owncloud/data/.htaccess
     chown <http-user>:<http-user> /path/to/owncloud/apps/
-    chmod 750 /path/to/owncloud/apps/
+    chmod 0750 /path/to/owncloud/apps/
     
 These strict permissions will prevent the Updater app from working (see :doc:`../maintenance/update`). If you use the Updater app, it needs your whole
 ownCloud directory to be owned by the HTTP user, like these examples: