diff --git a/Lib/shelve.py b/Lib/shelve.py
index 581baf1e6f3fb4..dfd7316b7f838c 100644
--- a/Lib/shelve.py
+++ b/Lib/shelve.py
@@ -235,7 +235,7 @@ def open(filename, flag='c', protocol=None, writeback=False):
     filename and more than one file may be created.  The optional flag
     parameter has the same interpretation as the flag parameter of
     dbm.open(). The optional protocol parameter specifies the
-    version of the pickle protocol (0, 1, or 2).
+    version of the pickle protocol.
 
     See the module's __doc__ string for an overview of the interface.
     """