diff --git a/src/jecs.d.ts b/src/jecs.d.ts
index 2c6b7aa..b4b4bfc 100755
--- a/src/jecs.d.ts
+++ b/src/jecs.d.ts
@@ -280,7 +280,7 @@ export class World {
 	removed<T>(component: Entity<T>, listener: (e: Entity, id: Id<T>, deleted?: true) => void): () => void;
 }
 
-export function world(): World;
+export function world(DEBUG?: boolean): World;
 
 export function component<T>(): Entity<T>;