diff --git a/doc/index.mdwn b/doc/index.mdwn
index d863a9ede9..5cd6b45494 100644
--- a/doc/index.mdwn
+++ b/doc/index.mdwn
@@ -23,6 +23,10 @@ To get a feel for it, see the [[walkthrough]].
 * [[todo]]
 * [[forum]]
 * [[contact]]
+
+<a href="http://flattr.com/thing/84843/git-annex">
+<img src="http://api.flattr.com/button/button-compact-static-100x17.png"
+alt="Flattr this" title="Flattr this" /></a>
 """]]
 
 ## sample use cases