diff --git a/python/_util.py b/python/_util.py
index 98bf5698..7d968227 100644
--- a/python/_util.py
+++ b/python/_util.py
@@ -6,7 +6,7 @@
 
 
 # From pyzolib/paths.py (https://bitbucket.org/pyzo/pyzolib/src/tip/paths.py)
-def appdata_dir(appname=None, roaming=False, is_file=True):
+def appdata_dir(appname=None, roaming=False):
     """appdata_dir(appname=None, roaming=False)
 
     Get the path to the application directory, where applications are allowed