diff --git a/lib/index.d.ts b/lib/index.d.ts
index 013efd2..b3ba481 100644
--- a/lib/index.d.ts
+++ b/lib/index.d.ts
@@ -133,9 +133,10 @@ export class World {
 
 export const pair: (pred: Entity, obj: Entity) => Entity;
 
+export const IS_PAIR: (e: Entity) => boolean;
+
 export const OnAdd: Entity;
 export const OnRemove: Entity;
 export const OnSet: Entity;
 export const Wildcard: Entity;
-export const w: Entity;
-export const REST: Entity;
\ No newline at end of file
+export const Rest: Entity;
\ No newline at end of file