diff --git a/system/libraries/Output.php b/system/libraries/Output.php
index 9523599..c5a9a62 100644
--- a/system/libraries/Output.php
+++ b/system/libraries/Output.php
@@ -191,6 +191,7 @@
 		}
 		
 		// Build the file path.  The file name is an MD5 hash of the full URI
+		$obj =& get_instance();
 		$uri =	$obj->config->item('base_url').
 				$obj->config->item('index_page').
 				$obj->uri->uri_string();