diff --git a/Lib/http/cookiejar.py b/Lib/http/cookiejar.py
index be828eba6987..4dc468bacc9a 100644
--- a/Lib/http/cookiejar.py
+++ b/Lib/http/cookiejar.py
@@ -1973,7 +1973,7 @@ class MozillaCookieJar(FileCookieJar):
     magic_re = re.compile("#( Netscape)? HTTP Cookie File")
     header = """\
 # Netscape HTTP Cookie File
-# http://www.netscape.com/newsref/std/cookie_spec.html
+# http://curl.haxx.se/rfc/cookie_spec.html
 # This is a generated file!  Do not edit.
 
 """