diff --git a/Lib/xmllib.py b/Lib/xmllib.py
index 4c6594b..37f3f91 100644
--- a/Lib/xmllib.py
+++ b/Lib/xmllib.py
@@ -79,7 +79,7 @@
 # special names to handle tags: start_foo and end_foo to handle <foo>
 # and </foo>, respectively.  The data between tags is passed to the
 # parser by calling self.handle_data() with some data as argument (the
-# data may be split up in arbutrary chunks).
+# data may be split up in arbitrary chunks).
 
 class XMLParser:
     attributes = {}                     # default, to be overridden