diff --git a/Lib/_abcoll.py b/Lib/_abcoll.py
index 7a01e1d..856a816 100644
--- a/Lib/_abcoll.py
+++ b/Lib/_abcoll.py
@@ -107,7 +107,7 @@
     __metaclass__ = ABCMeta
 
     @abstractmethod
-    def __contains__(self, x):
+    def __call__(self, *args, **kwds):
         return False
 
     @classmethod