diff --git a/src/python/m5/util/grammar.py b/src/python/m5/util/grammar.py
index 93c2c84c4..ab5f35868 100644
--- a/src/python/m5/util/grammar.py
+++ b/src/python/m5/util/grammar.py
@@ -55,6 +55,7 @@ class Tokenizer(object):
                         break
                     yield tok
         self.input = _input()
+        self.lexer = lexer
 
     def next(self):
         return self.input.next()
@@ -68,6 +69,9 @@ class Tokenizer(object):
         except StopIteration:
             return None
 
+    def __getattr__(self, attr):
+        return getattr(self.lexer, attr)
+
 class Grammar(object):
     def __init__(self, output=None, debug=False):
         self.yacc_args = {}