diff --git a/Lib/pydoc.py b/Lib/pydoc.py
index 90fa1b3..ff9a5f4 100755
--- a/Lib/pydoc.py
+++ b/Lib/pydoc.py
@@ -1113,7 +1113,7 @@
             result = result + self.section('CREDITS', str(object.__credits__))
         return result
 
-    def docclass(self, object, name=None, mod=None):
+    def docclass(self, object, name=None, mod=None, *ignored):
         """Produce text documentation for a given class object."""
         realname = object.__name__
         name = name or realname