diff --git a/docs/DESIGN.md b/docs/DESIGN.md
index f5445dc2677..c8252d27c02 100644
--- a/docs/DESIGN.md
+++ b/docs/DESIGN.md
@@ -16,7 +16,7 @@ Low level code for dealing with internet mail protocols
 
 ## plugins
 
-Additional, standalone, libraries used by K-9
+Additional, standalone, libraries used by Thunderbird for Android
 
 ![modules](Modules.png)