diff --git a/sugar/sugar.d.ts b/sugar/sugar.d.ts
index de418b65e5..11569a3b66 100644
--- a/sugar/sugar.d.ts
+++ b/sugar/sugar.d.ts
@@ -2820,7 +2820,7 @@ interface Array<T> {
 	* @see subtract
 	**/
 	subtract(args: T[]): T[];
-	
+
 	/**
 	* Sums all values in the array.
 	* @param map Property on each element in the array or callback function to sum up the elements.
@@ -2836,6 +2836,11 @@ interface Array<T> {
 	**/
 	sum(map: string): number;
 
+    /**
+    * @see sum
+    **/
+	sum(): number;
+
 	/**
 	* @see sum
 	**/