diff --git a/prettyjson/prettyjson-tests.ts b/prettyjson/prettyjson-tests.ts
index 9d7c43918d..80ecbbb0f7 100644
--- a/prettyjson/prettyjson-tests.ts
+++ b/prettyjson/prettyjson-tests.ts
@@ -1,6 +1,6 @@
 /// <reference path="prettyjson.d.ts" />
 
-var options: prettyjson.IOptions,
+var options: prettyjson.RendererOptions,
 	input: string,
 	output: string,
 	version: string;
diff --git a/prettyjson/prettyjson.d.ts b/prettyjson/prettyjson.d.ts
index b2a6399ac8..cf2a69c197 100644
--- a/prettyjson/prettyjson.d.ts
+++ b/prettyjson/prettyjson.d.ts
@@ -20,7 +20,7 @@ declare module prettyjson {
    *
    * @return {string} pretty serialized json data ready to display.
      */
-  export function render(data: any, options?: IOptions, indentation?: number): string;
+  export function render(data: any, options?: RendererOptions, indentation?: number): string;
 
   /**
    * Render pretty json from a string.
@@ -31,9 +31,9 @@ declare module prettyjson {
    *
    * @return {string} pretty serialized json data ready to display.
      */
-  export function renderString(data: string, options?: IOptions, indentation?: number): string;
+  export function renderString(data: string, options?: RendererOptions, indentation?: number): string;
 
-  export interface IOptions {
+  export interface RendererOptions {
 
     /**
      * Define behavior for Array objects