diff --git a/jecs.d.ts b/jecs.d.ts
index 12ba7a4..a9caeae 100644
--- a/jecs.d.ts
+++ b/jecs.d.ts
@@ -288,6 +288,9 @@ export function pair_first<P, O>(world: World, p: Pair<P, O>): Entity<P>;
  */
 export function pair_second<P, O>(world: World, p: Pair<P, O>): Entity<O>;
 
+export function ECS_PAIR_FIRST(pair: Pair): number;
+export function ECS_PAIR_SECOND(pair: Pair): number;
+
 type StatefulHook = Entity<<T>(e: Entity<T>, id: Id<T>, data: T) => void> & {
 	readonly __nominal_StatefulHook: unique symbol,
 }