diff --git a/sly/lex.py b/sly/lex.py
index 221ea73..407649e 100644
--- a/sly/lex.py
+++ b/sly/lex.py
@@ -68,7 +68,7 @@ class Token(object):
     '''
     __slots__ = ('type', 'value', 'lineno', 'index')
     def __repr__(self):
-        return f'Token(type={self.type!r}, value={self.value!r}, lineno={self.lineno}, index={self.index}'
+        return f'Token(type={self.type!r}, value={self.value!r}, lineno={self.lineno}, index={self.index})'
 
 class LexerMetaDict(OrderedDict):
     '''