diff --git a/config/formats.js b/config/formats.js
index b937cd78a1..5a15552470 100644
--- a/config/formats.js
+++ b/config/formats.js
@@ -43,6 +43,9 @@ let Formats = [
 		mod: 'gen8',
 		ruleset: ['Standard', 'Dynamax Clause'],
 		banlist: ['Uber', 'Moody', 'Shadow Tag', 'Baton Pass'],
+		onBegin() {
+			if (this.rated && this.format.id === 'gen8ou') this.add('html', `<div class="broadcast-red"><strong>OU is currently suspecting Arena Trap! For information on how to participate check out the <a href="https://www.smogon.com/forums/threads/3661134/">suspect thread</a>.</strong></div>`);
+		},
 	},
 	/*{
 		name: "[Gen 8] OU (Blitz)",