diff --git a/sugar/sugar.d.ts b/sugar/sugar.d.ts
index e5f9c97d7b..de418b65e5 100644
--- a/sugar/sugar.d.ts
+++ b/sugar/sugar.d.ts
@@ -2569,7 +2569,7 @@ interface Array<T> {
 	/**
 	* @see max
 	**/
-	max<U>(map: (n: T) => U): T[];
+	max<U>(map: (n: T) => U, all: boolean): T[];
 
 	/***
 	* Returns the element in the array with the lowest value.