diff --git a/notes.md b/notes.md
index 061a63ca9a1b708dab5a167a47f8e5e01d7c8189..e8b87e919754daa0044a34060b6ed02a3205aa51 100644
--- a/notes.md
+++ b/notes.md
@@ -101,7 +101,7 @@ need followup.
   commit and its becoming public can be seen?  Karl guesses that they
   do preserve all the metadata, but we should check.)
 
-* OPSI ["co-funding"](https://www.opsi.org/de/dokumentation/opsi-lizenz-und-copyright https://forum.opsi.org/viewtopic.php?t=1193)
+* OPSI ["co-funding"](https://www.opsi.org/de/dokumentation/opsi-lizenz-und-copyright) (see also [this forum link](https://forum.opsi.org/viewtopic.php?t=1193))
 
 * [OTRS](https://www.znuny.org/en/blog/why) (open source -> delayed ->
   proprietary), but one person said that the announced delayed open release