diff --git a/addressbook/inc/hook_addressbook_deleteaccount.inc.php b/addressbook/inc/hook_addressbook_deleteaccount.inc.php
index 32583e336b..89282e9ada 100755
--- a/addressbook/inc/hook_addressbook_deleteaccount.inc.php
+++ b/addressbook/inc/hook_addressbook_deleteaccount.inc.php
@@ -13,7 +13,7 @@
 	/* $Id$ */
 
 	// Delete all records for a user
-	if (floor($PHP_VERSION ) == 4)
+	if (floor(phpversion()) == 4)
 	{
 		global $account_id, $new_owner;
 	}