diff --git a/Lib/xml/sax/xmlreader.py b/Lib/xml/sax/xmlreader.py
index 8e23084..46ee02b 100644
--- a/Lib/xml/sax/xmlreader.py
+++ b/Lib/xml/sax/xmlreader.py
@@ -322,7 +322,7 @@
         return name in self._attrs
 
     def __contains__(self, name):
-        return self._attrs.has_key(name)
+        return name in self._attrs
 
     def get(self, name, alternative=None):
         return self._attrs.get(name, alternative)