diff --git a/Lib/collections/__init__.py b/Lib/collections/__init__.py
index 78229ac54b8..d2ddc1cd9ec 100644
--- a/Lib/collections/__init__.py
+++ b/Lib/collections/__init__.py
@@ -595,7 +595,7 @@ class Counter(dict):
     # References:
     #   http://en.wikipedia.org/wiki/Multiset
     #   http://www.gnu.org/software/smalltalk/manual-base/html_node/Bag.html
-    #   http://www.demo2s.com/Tutorial/Cpp/0380__set-multiset/Catalog0380__set-multiset.htm
+    #   http://www.java2s.com/Tutorial/Cpp/0380__set-multiset/Catalog0380__set-multiset.htm
     #   http://code.activestate.com/recipes/259174/
     #   Knuth, TAOCP Vol. II section 4.6.3