diff --git a/Lib/shlex.py b/Lib/shlex.py
index 6632b87..fa18bb9 100644
--- a/Lib/shlex.py
+++ b/Lib/shlex.py
@@ -271,8 +271,8 @@
             raise StopIteration
         return token
 
-def split(s, comments=False):
-    lex = shlex(s, posix=True)
+def split(s, comments=False, posix=True):
+    lex = shlex(s, posix)
     lex.whitespace_split = True
     if not comments:
         lex.commenters = ''