diff --git a/pkgs/applications/version-management/rcs/default.nix b/pkgs/applications/version-management/rcs/default.nix
index d46a67a8601e..5f2f9aab2b3c 100644
--- a/pkgs/applications/version-management/rcs/default.nix
+++ b/pkgs/applications/version-management/rcs/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, fetchpatch, buildPackages, diffutils, ed, lzip }:
+{ lib, stdenv, fetchurl, buildPackages, diffutils, ed, lzip }:
 
 stdenv.mkDerivation rec {
   pname = "rcs";