diff --git a/pkgs/applications/version-management/mercurial/default.nix b/pkgs/applications/version-management/mercurial/default.nix
index 579a4ae6600..6148a5af022 100644
--- a/pkgs/applications/version-management/mercurial/default.nix
+++ b/pkgs/applications/version-management/mercurial/default.nix
@@ -1,7 +1,7 @@
 args: with args;
 
 stdenv.mkDerivation {
-  name = "mercurial-1.0.2";
+  name = "mercurial-1.2.2";
   src = fetchurl {
     url = http://www.selenic.com/mercurial/release/mercurial-1.2.1.tar.gz;
     sha256 = "0zmldqvl6lbg40d4jbx6hm8790bi8h4dfmawinvq5gfgpij78603";