diff --git a/typings/index.d.ts b/typings/index.d.ts
index 18575b304..c98e7a16c 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -311,7 +311,7 @@ declare module 'discord.js' {
 		public random(count: number): V[];
 		public randomKey(): K | undefined;
 		public randomKey(count: number): K[];
-		public reduce<T>(fn: (accumulator: any, value: V, key: K, collection: Collection<K, V>) => T, initialValue?: any): T;
+		public reduce<T>(fn: (accumulator: T, value: V, key: K, collection: Collection<K, V>) => T, initialValue?: T): T;
 		public some(fn: (value: V, key: K, collection: Collection<K, V>) => boolean, thisArg?: any): boolean;
 		public sort(compareFunction?: (a: V, b: V, c?: K, d?: K) => number): Collection<K, V>;
 		public sweep(fn: (value: V, key: K, collection: Collection<K, V>) => boolean, thisArg?: any): number;