diff --git a/src/mame/drivers/ravens.cpp b/src/mame/drivers/ravens.cpp
index 109626c0b22..5bd97c2a571 100644
--- a/src/mame/drivers/ravens.cpp
+++ b/src/mame/drivers/ravens.cpp
@@ -8,6 +8,7 @@ This is a project described in "Ravensburger" magazine. You had to make
 the entire thing (including the circuit boards) yourself.
 
 
+https://web.archive.org/web/20160321001634/http://petersieg.bplaced.com/?2650_Computer:2650_Selbstbaucomputer
         2013-04-23 Skeleton driver.