diff --git a/typings/index.d.ts b/typings/index.d.ts
index e1a6bac84..f77ab51ee 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -289,7 +289,7 @@ declare module 'discord.js' {
 		public lastKey(): K | undefined;
 		public lastKey(count: number): K[];
 		public map<T>(fn: (value: V, key: K, collection: Collection<K, V>) => T, thisArg?: any): T[];
-		public partition(fn: (value: V, key: K, collection: Collection<K, V>) => boolean): [Collection<K, V>, Collection<K, V>];
+		public partition(fn: (value: V, key: K, collection: Collection<K, V>) => boolean, thisArg?: any): [Collection<K, V>, Collection<K, V>];
 		public random(): V | undefined;
 		public random(count: number): V[];
 		public randomKey(): K | undefined;