Return an empty string iff a token's value is None.

1 files changed, 1 insertions, 1 deletions

diff --git a/sqlparse/sql.py b/sqlparse/sql.py
index 2d94440..e17285c 100644
--- a/sqlparse/sql.py
+++ b/sqlparse/sql.py
@@ -31,7 +31,7 @@ class Token(object):
                                           short, id(self))
 
     def __unicode__(self):
-        return self.value
+        return self.value or ''
 
     def to_unicode(self):
         """Returns a unicode representation of this object."""