diff --git a/ui/round/src/ctrl.ts b/ui/round/src/ctrl.ts
index 0f3a280103..0875aadbdb 100644
--- a/ui/round/src/ctrl.ts
+++ b/ui/round/src/ctrl.ts
@@ -574,7 +574,7 @@ export default class RoundController {
     if (was !== is) {
       lichess.quietMode = is;
       $('body')
-        .toggleClass('playing', !this.data.spectator)
+        .toggleClass('playing', !this.data.player.spectator)
         .toggleClass('no-select', is && this.clock && this.clock.millisOf(this.data.player.color) <= 3e5);
     }
   };