diff --git a/lib/_range.py b/lib/_range.py
index 30cda679..e72c8789 100644
--- a/lib/_range.py
+++ b/lib/_range.py
@@ -63,7 +63,7 @@ class Range(object):
                 self._lower, self._upper, self._bounds)
 
     def __str__(self):
-        if (self._lower, self._upper, self._bounds) == (None, None, None):
+        if self._bounds is None:
             return 'empty'
 
         items = [