diff --git a/core/util.inc.php b/core/util.inc.php
index b126d543..3542b91f 100644
--- a/core/util.inc.php
+++ b/core/util.inc.php
@@ -183,13 +183,10 @@ function get_memory_limit() {
 	return $memory;
 }
 
-function get_session_ip() {
-	global $config;
-
+function get_session_ip($config) {
     $mask = $config->get_string("session_hash_mask", "255.255.0.0");
     $addr = $_SERVER['REMOTE_ADDR'];
     $addr = inet_ntop(inet_pton($addr) & inet_pton($mask));
-
     return $addr;
 }
 
diff --git a/ext/user/main.php b/ext/user/main.php
index d259a499..d7051ba8 100644
--- a/ext/user/main.php
+++ b/ext/user/main.php
@@ -238,7 +238,7 @@ class UserPage implements Extension {
 	private function set_login_cookie($name, $pass) {
 		global $config;
 
-		$addr = get_session_ip();
+		$addr = get_session_ip($config);
 		$hash = md5(strtolower($name) . $pass);
 
 		setcookie("shm_user", $name,