diff --git a/system/libraries/Encrypt.php b/system/libraries/Encrypt.php
index 537b1ab..2a1de6f 100644
--- a/system/libraries/Encrypt.php
+++ b/system/libraries/Encrypt.php
@@ -66,8 +66,8 @@
 				return $this->encryption_key;
 			}
 		
-			$obj =& get_instance();
-			$key = $obj->config->item('encryption_key');
+			$CI =& get_instance();
+			$key = $CI->config->item('encryption_key');
 
 			if ($key === FALSE)
 			{