diff --git a/pkgs/by-name/rt/rtorrent/package.nix b/pkgs/by-name/rt/rtorrent/package.nix
index 3b58082dd422..5afa2ced4c56 100644
--- a/pkgs/by-name/rt/rtorrent/package.nix
+++ b/pkgs/by-name/rt/rtorrent/package.nix
@@ -63,7 +63,7 @@ stdenv.mkDerivation rec {
   ];
 
   passthru = {
-    updateScript = unstableGitUpdater { rev-prefix = "v"; };
+    updateScript = unstableGitUpdater { tagPrefix = "v"; };
     tests = {
       inherit (nixosTests) rtorrent;
     };