diff --git a/pkgs/desktops/gnome-3/extensions/topicons-plus/default.nix b/pkgs/desktops/gnome-3/extensions/topicons-plus/default.nix
index 4612c35ad25..4aedc10e056 100644
--- a/pkgs/desktops/gnome-3/extensions/topicons-plus/default.nix
+++ b/pkgs/desktops/gnome-3/extensions/topicons-plus/default.nix
@@ -2,7 +2,7 @@
 
 stdenv.mkDerivation rec {
   name = "gnome-shell-extension-topicons-plus-${version}";
-  version = "v20";
+  version = "20";
 
   src = fetchFromGitHub {
     owner = "phocean";