diff --git a/README.asciidoc b/README.asciidoc
index 7f5f1f5..924ce9c 100644
--- a/README.asciidoc
+++ b/README.asciidoc
@@ -15,6 +15,8 @@ chmod +x ~/bin/git-remote-hg
 
 That's it :)
 
+Obviously you will need Mercurial installed.
+
 == Configuration ==
 
 If you want to see Mercurial revisions as Git commit notes: