diff --git a/types/accounting/accounting-tests.ts b/types/accounting/accounting-tests.ts
index a397c559eb..41150f7a37 100644
--- a/types/accounting/accounting-tests.ts
+++ b/types/accounting/accounting-tests.ts
@@ -3,6 +3,9 @@
 // Default usage:
 accounting.formatMoney(12345678); // $12,345,678.00
 
+// Stringified usage:
+accounting.formatMoney('$4394958309392.9401'); // $4,394,958,309,392.94
+
 // European formatting (custom symbol and separators), could also use options object as second param:
 accounting.formatMoney(4999.99, "€", 2, ".", ","); // €4.999,99
 
diff --git a/types/accounting/index.d.ts b/types/accounting/index.d.ts
index ef8991999f..9a990a6519 100644
--- a/types/accounting/index.d.ts
+++ b/types/accounting/index.d.ts
@@ -1,6 +1,7 @@
-// Type definitions for accounting.js 0.3
-// Project: http://josscrowcroft.github.io/accounting.js/
+// Type definitions for accounting.js 0.4
+// Project: http://openexchangerates.github.io/accounting.js/
 // Definitions by: Sergey Gerasimov <https://github.com/gerich-home/>
+//                 Christopher Eck <https://github.com/chrisleck/>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 declare namespace accounting {
@@ -30,9 +31,9 @@ declare namespace accounting {
     }
 
     interface Static {
-        // format any number into currency
-        formatMoney(number: number, symbol?: string, precision?: number, thousand?: string, decimal?: string, format?: string): string;
-        formatMoney(number: number, options: CurrencySettings<string> | CurrencySettings<CurrencyFormat>): string;
+        // format any number or stringified number into currency
+        formatMoney(number: number | string, symbol?: string, precision?: number, thousand?: string, decimal?: string, format?: string): string;
+        formatMoney(number: number | string, options: CurrencySettings<string> | CurrencySettings<CurrencyFormat>): string;
 
         formatMoney(numbers: number[], symbol?: string, precision?: number, thousand?: string, decimal?: string, format?: string): string[];
         formatMoney(numbers: number[], options: CurrencySettings<string> | CurrencySettings<CurrencyFormat>): string[];