diff --git a/doc/ADMIN.md b/doc/ADMIN.md
index 7b6bf2e..1984b74 100644
--- a/doc/ADMIN.md
+++ b/doc/ADMIN.md
@@ -1,5 +1,5 @@
 ## Custom configurations
 
-If you wish, you can add personal costum configurations by editing the `__INSTALL_DIR__/config.local.user.php` file. To see the possibilities, you can read the `__INSTALL_DIR__/config.dist.php` file first.
+If you wish, you can add personal custom configurations by editing the `__INSTALL_DIR__/config.local.user.php` file. To see the possibilities, you can read the `__INSTALL_DIR__/config.dist.php` file first.