diff --git a/pkgs/desktops/mate/mate-panel/default.nix b/pkgs/desktops/mate/mate-panel/default.nix
index 92da012ca7d..7f084362add 100644
--- a/pkgs/desktops/mate/mate-panel/default.nix
+++ b/pkgs/desktops/mate/mate-panel/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-panel-${version}";
-  version = "1.21.1";
+  version = "1.20.4";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "0093pimqkx5db2nciksgrmq02hldg08p7hghafky3njl0kzv8l5z";
+    sha256 = "02pdrwgl3plgv6l6nc45nsnmjppkxs4ybggwibd6mm777i9nb44d";
   };
 
   nativeBuildInputs = [