diff --git a/pkgs/applications/terminal-emulators/rxvt-unicode-plugins/urxvt-bidi/default.nix b/pkgs/applications/terminal-emulators/rxvt-unicode-plugins/urxvt-bidi/default.nix
index ec2d08862ecd..ff7c1b1a2d7d 100644
--- a/pkgs/applications/terminal-emulators/rxvt-unicode-plugins/urxvt-bidi/default.nix
+++ b/pkgs/applications/terminal-emulators/rxvt-unicode-plugins/urxvt-bidi/default.nix
@@ -32,5 +32,8 @@ perlPackages.buildPerlPackage rec {
     homepage = "https://github.com/mkamensky/Text-Bidi";
     maintainers = with maintainers; [ doronbehar ];
     platforms = with platforms; unix;
+    # Quote from the README:
+    # same terms as the Perl 5 programming language system itself
+    license = perlPackages.perl.meta.license;
   };
 }
diff --git a/pkgs/applications/terminal-emulators/rxvt-unicode-plugins/urxvt-tabbedex/default.nix b/pkgs/applications/terminal-emulators/rxvt-unicode-plugins/urxvt-tabbedex/default.nix
index e1b3ff6233fa..98fb59bf9795 100644
--- a/pkgs/applications/terminal-emulators/rxvt-unicode-plugins/urxvt-tabbedex/default.nix
+++ b/pkgs/applications/terminal-emulators/rxvt-unicode-plugins/urxvt-tabbedex/default.nix
@@ -25,5 +25,6 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/mina86/urxvt-tabbedex";
     maintainers = [ ];
     platforms = with platforms; unix;
+    license = lib.licenses.gpl3Plus;
   };
 }