diff --git a/libraries/auth/cookie.auth.lib.php b/libraries/auth/cookie.auth.lib.php
index d9f8aeb62..991a519f7 100644
--- a/libraries/auth/cookie.auth.lib.php
+++ b/libraries/auth/cookie.auth.lib.php
@@ -1,5 +1,5 @@
 <?php
-// vim: expandtab sw=4 ts=4 sts=4:
+/* vim: set expandtab sw=4 ts=4 sts=4: */
 /**
  * Set of functions used to run cookie based authentication.
  * Thanks to Piotr Roszatycki <d3xter at users.sourceforge.net> and