diff --git a/xarray/coding/cftime_offsets.py b/xarray/coding/cftime_offsets.py
index 83e8c7a7e4b..9cdd74537d8 100644
--- a/xarray/coding/cftime_offsets.py
+++ b/xarray/coding/cftime_offsets.py
@@ -553,7 +553,7 @@ def _count_not_none(*args):
 
 
 def cftime_range(start=None, end=None, periods=None, freq='D',
-                 tz=None, normalize=False, name=None, closed=None,
+                 normalize=False, name=None, closed=None,
                  calendar='standard'):
     """Return a fixed frequency CFTimeIndex.