diff --git a/system/engine/interfaces/url.php b/system/engine/interfaces/url.php
index eae425a..d39ed5d 100644
--- a/system/engine/interfaces/url.php
+++ b/system/engine/interfaces/url.php
@@ -11,6 +11,8 @@ namespace Phacil\Framework\Interfaces;
 
 interface Url
 {
+	const NONSSL = 'NONSSL';
+
 	/**
 	 * @param string $url 
 	 * @param string $ssl 
@@ -24,7 +26,7 @@ interface Url
 	 * @param string $connection 
 	 * @return string 
 	 */
-	public function link($route, $args = '', $connection = 'NONSSL');
+	public function link($route, $args = '', $connection = self::NONSSL);
 
 	/**
 	 * @param string $hook 
diff --git a/system/system.php b/system/system.php
index 4b3d171..fbea04d 100644
--- a/system/system.php
+++ b/system/system.php
@@ -99,7 +99,7 @@ final class startEngineExacTI {
 
         self::$RegistryAlt = &$this->registry;
 
-        $this->registry::addPreference(\Phacil\Framework\Config::DIR_SYSTEM()."etc/preferences.json");
+        \Phacil\Framework\Registry::addPreference(\Phacil\Framework\Config::DIR_SYSTEM()."etc/preferences.json");
 
         if($this->composer) {
             $this->registry->set('composer', $this->composer);
diff --git a/system/url/autoload.php b/system/url/autoload.php
index 67a430b..4572bbf 100644
--- a/system/url/autoload.php
+++ b/system/url/autoload.php
@@ -67,8 +67,8 @@ class Url implements UrlInterface {
 	 * @param string $connection 
 	 * @return string 
 	 */
-	public function link($route, $args = '', $connection = 'NONSSL') {
-		if ($connection ==  'NONSSL') {
+	public function link($route, $args = '', $connection = self::NONSSL) {
+		if ($connection == self::NONSSL) {
 			$url = $this->url;	
 		} else {
 			$url = $this->ssl;