diff --git a/lib/cli/arguments/Lexer.php b/lib/cli/arguments/Lexer.php
index a5a4767..3fb054b 100644
--- a/lib/cli/arguments/Lexer.php
+++ b/lib/cli/arguments/Lexer.php
@@ -15,6 +15,7 @@
 use cli\Memoize;
 
 class Lexer extends Memoize implements \Iterator {
+	private $_item;
 	private $_items = array();
 	private $_index = 0;
 	private $_length = 0;