diff --git a/pkgs/applications/misc/urlscan/default.nix b/pkgs/applications/misc/urlscan/default.nix
index b686c4ba9c4..3875886266d 100644
--- a/pkgs/applications/misc/urlscan/default.nix
+++ b/pkgs/applications/misc/urlscan/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, isPy35, fetchFromGitHub, urwid }:
+{ stdenv, buildPythonPackage, isPy35, fetchFromGitHub, urwid, pythonOlder }:
 
 buildPythonPackage rec {
   name = "urlscan-${version}";