diff --git a/ExistingProjects.mdwn b/ExistingProjects.mdwn
index ec43a3f..2dde08d 100644
--- a/ExistingProjects.mdwn
+++ b/ExistingProjects.mdwn
@@ -67,4 +67,4 @@ linked page.
   * [Not free software](https://beansbooks.com/home/opensource)
   * The developers have been reached, not yet replied.
 * [[ExistingProjects/OpenPetra]]
-  * The linux client is not stable as of 2013-11-25. This using the client from <http://www.pokorra.de/2013/11/install-openpetra-on-linux/>.
+  * The linux client is not stable as of 2013-11-25. This using the client from <http://www.pokorra.de/2013/11/install-openpetra-on-linux/>. The developers also acknowledge the fact that the linux client is not as stable as the windows client.