diff --git a/pkgs/applications/science/math/gap/default.nix b/pkgs/applications/science/math/gap/default.nix
index f6a9f58b176..a7105705f38 100644
--- a/pkgs/applications/science/math/gap/default.nix
+++ b/pkgs/applications/science/math/gap/default.nix
@@ -129,6 +129,7 @@ stdenv.mkDerivation rec {
     [
       raskin
       chrisjefferson
+      timokau
     ];
     platforms = platforms.all;
     # keeping all packages increases the package size considerably, wchich