diff --git a/pkgs/by-name/tr/trackballs/package.nix b/pkgs/by-name/tr/trackballs/package.nix
index 1b21058149a1..c01235a7a806 100644
--- a/pkgs/by-name/tr/trackballs/package.nix
+++ b/pkgs/by-name/tr/trackballs/package.nix
@@ -25,6 +25,10 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-JKSiNe5mu8rRztUhduGFY6IsSMx6VyBqKcGO5EssI+8=";
   };
 
+  postPatch = ''
+    substituteInPlace src/glHelp.h --replace-fail _TTF_Font TTF_Font
+  '';
+
   nativeBuildInputs = [ cmake ];
   buildInputs = [
     zlib