Fix URL.
diff --git a/Doc/using/mac.rst b/Doc/using/mac.rst
index 18bfb82..c5f7f2d 100644
--- a/Doc/using/mac.rst
+++ b/Doc/using/mac.rst
@@ -122,8 +122,8 @@
 =======
 
 MacPython ships with the standard IDLE development environment. A good
-introduction to using IDLE can be found at http://hkn.eecs.berkeley.edu/
-dyoo/python/idle_intro/index.html.
+introduction to using IDLE can be found at
+http://hkn.eecs.berkeley.edu/~dyoo/python/idle_intro/index.html.
 
 
 .. _mac-package-manager: