diff --git a/doc/index.mdwn b/doc/index.mdwn
index 93526c42c..d8d90e508 100644
--- a/doc/index.mdwn
+++ b/doc/index.mdwn
@@ -1,4 +1,4 @@
-Ikiwiki is a **wiki compiler**. It converts wiki pages into HTML pages
+Ikiwiki is a **wiki compiler** written in Perl. It converts wiki pages into HTML pages
 suitable for publishing on a website. Ikiwiki stores pages and history in a
 [[revision_control_system|rcs]] such as [[Subversion|rcs/svn]] or [[rcs/Git]].
 There are many other [[features]], including support for