diff --git a/docs/example/DdsImagePlugin.py b/docs/example/DdsImagePlugin.py
index 29e13b920..077590f22 100644
--- a/docs/example/DdsImagePlugin.py
+++ b/docs/example/DdsImagePlugin.py
@@ -3,7 +3,7 @@ A Pillow loader for .dds files (S3TC-compressed aka DXTC)
 Jerome Leclanche <jerome@leclan.ch>
 
 Documentation:
-  http://oss.sgi.com/projects/ogl-sample/registry/EXT/texture_compression_s3tc.txt
+  https://web.archive.org/web/20170802060935/http://oss.sgi.com/projects/ogl-sample/registry/EXT/texture_compression_s3tc.txt
 
 The contents of this file are hereby released in the public domain (CC0)
 Full text of the CC0 license: