diff --git a/pkgs/desktops/xfce/panel-plugins/xfce4-hardware-monitor-plugin/default.nix b/pkgs/desktops/xfce/panel-plugins/xfce4-hardware-monitor-plugin/default.nix
index a7ca43dc3a7..3a01e806387 100644
--- a/pkgs/desktops/xfce/panel-plugins/xfce4-hardware-monitor-plugin/default.nix
+++ b/pkgs/desktops/xfce/panel-plugins/xfce4-hardware-monitor-plugin/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   meta = with lib; {
     homepage = "https://goodies.xfce.org/projects/panel-plugins/xfce4-hardware-monitor-plugin";
     description = "Hardware monitor plugin for the XFCE4 panel";
-    license = licenses.gpl3;
+    license = licenses.gpl3Only;
     platforms = platforms.unix;
     broken = true; # unmaintained plugin; no longer compatible with xfce 4.16
     maintainers = [ maintainers.romildo ];