diff --git a/Lib/subprocess.py b/Lib/subprocess.py
index 477af38..4c6b763 100644
--- a/Lib/subprocess.py
+++ b/Lib/subprocess.py
@@ -516,7 +516,9 @@
     """
 
     # See
-    # http://msdn.microsoft.com/library/en-us/vccelng/htm/progs_12.asp
+    # http://msdn.microsoft.com/en-us/library/17w5ykft.aspx
+    # or search http://msdn.microsoft.com for
+    # "Parsing C++ Command-Line Arguments"
     result = []
     needquote = False
     for arg in seq: