diff --git a/src/archive/zip/struct.go b/src/archive/zip/struct.go
index e92d02f8a2..0be210e8e7 100644
--- a/src/archive/zip/struct.go
+++ b/src/archive/zip/struct.go
@@ -5,7 +5,7 @@
 /*
 Package zip provides support for reading and writing ZIP archives.
 
-See: https://www.pkware.com/documents/casestudies/APPNOTE.TXT
+See: https://www.pkware.com/appnote
 
 This package does not support disk spanning.