diff --git a/actor.ts b/actor.ts
index 5589333..c0f3b8d 100644
--- a/actor.ts
+++ b/actor.ts
@@ -142,7 +142,7 @@ export class Turn {
     }
 
     enqueue(actor: Actor, a: LocalAction): void {
-        this.queues.has(actor) ? this.queues.get(actor)!.push(a) : this.queues.set(actor, [a]);
+        this.queues.get(actor)?.push(a) ?? this.queues.set(actor, [a]);
     }
 
     complete(): void {