Replace another fetch_directory() use
diff --git a/system/core/URI.php b/system/core/URI.php
index b2286f0..bc086d2 100644
--- a/system/core/URI.php
+++ b/system/core/URI.php
@@ -720,7 +720,7 @@
 	{
 		global $RTR;
 
-		if (($dir = $RTR->fetch_directory()) === '/')
+		if (($dir = $RTR->directory) === '/')
 		{
 			$dir = '';
 		}