diff --git a/system/public/aesthetic.computer/disks/catnom.mjs b/system/public/aesthetic.computer/disks/catnom.mjs
index 98c1bb63f9..dd1e649e56 100644
--- a/system/public/aesthetic.computer/disks/catnom.mjs
+++ b/system/public/aesthetic.computer/disks/catnom.mjs
@@ -3,12 +3,13 @@
 // board is one category from the classic parlor game, AC-flavored: slang,
 // code words, aesthetic computer pieces, vibes, keys, internet words. Each
 // munch speaks the word's meaning. Reuses lib/nom.mjs wholesale and just
-// forces category mode at boot.
+// forces category mode at boot. Paints on disk's hd() native-resolution
+// Canvas2D layer (the "hd" param), matching engnom.
 
 import { boot as nomBoot, sim, paint, act, makeMeta } from "../lib/nom.mjs";
 
 function boot(api) {
-  nomBoot({ ...api, params: ["cat"] });
+  nomBoot({ ...api, params: ["cat", "hd"] });
 }
 
 // Fixed identity (computed from params, not engine state) so the title is right