diff --git a/Sources/Subs.php b/Sources/Subs.php
index d578f5a..deb7448 100644
--- a/Sources/Subs.php
+++ b/Sources/Subs.php
@@ -1436,7 +1436,7 @@ function writeLog($force = false)
 
 	// Guests use 0, members use their session ID.
 	$session_id = $user_info['is_guest'] ? 'ip' . $user_info['ip'] : session_id();
-	$ip = ip2long($userinfo['ip']);
+	$ip = ip2long($user_info['ip']);
 
 	db_query("
 		DELETE FROM {$db_prefix}log_online