diff --git a/xml2js/xml2js-tests.ts b/xml2js/xml2js-tests.ts
index 3e3fbb661c..f2d9dc41e9 100644
--- a/xml2js/xml2js-tests.ts
+++ b/xml2js/xml2js-tests.ts
@@ -5,3 +5,13 @@ import xml2js = require('xml2js');
 xml2js.parseString("<root>Hello xml2js!</root>", (err: any, result: any) => { });
 
 xml2js.parseString("<root>Hello xml2js!</root>", {trim: true}, (err: any, result: any) => { });
+
+var builder = new xml2js.Builder({
+    renderOpts: {
+        pretty: false
+    }
+});
+
+var outString = builder.buildObject({
+    'hello': 'xml2js!'
+});
diff --git a/xml2js/xml2js.d.ts b/xml2js/xml2js.d.ts
index 30aa64a876..f734e4ba03 100644
--- a/xml2js/xml2js.d.ts
+++ b/xml2js/xml2js.d.ts
@@ -1,6 +1,6 @@
 // Type definitions for node-xml2js
 // Project: https://github.com/Leonidas-from-XIV/node-xml2js
-// Definitions by: Michel Salib <https://github.com/michelsalib>
+// Definitions by: Michel Salib <https://github.com/michelsalib>, Jason McNeil <https://github.com/jasonrm>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
 declare module 'xml2js' {
@@ -8,29 +8,58 @@ declare module 'xml2js' {
     export = xml2js;
 
     module xml2js {
-	    function parseString(xml:string, callback: (err: any, result:any) => void): void;
-	    function parseString(xml:string, options: Options, callback: (err: any, result:any) => void): void;
+        function parseString(xml: string, callback: (err: any, result: any) => void): void;
+        function parseString(xml: string, options: Options, callback: (err: any, result: any) => void): void;
 
-		interface Options {
-			attrkey?: string;
-			charkey?: string;
-			explicitCharkey?: boolean;
-	    	trim?: boolean;
-	    	normalizeTags?: boolean;
-	    	normalize?: boolean;
-	    	explicitRoot?: boolean;
-	    	emptyTag?: any;
-	    	explicitArray?: boolean;
-	    	ignoreAttrs?: boolean;
-	    	mergeAttrs?: boolean;
-	    	validator?: Function;
-	    	xmlns?: boolean;
-	    	explicitChildren?: boolean;
-	    	charsAsChildren?: boolean;
-	    	async?: boolean;
-	    	strict?: boolean;
-	    	attrNameProcessors?: (name: string) => string;
-	    	tagNameProcessors?: (name: string) => string;
-	    }
+        class Builder {
+            constructor(options?: BuilderOptions);
+            buildObject(rootObj: any): string;
+        }
+
+        interface RenderOptions {
+            indent?: string;
+            newline?: string;
+            pretty?: boolean;
+        }
+
+        interface XMLDeclarationOptions {
+            encoding?: string;
+            standalone?: boolean;
+            version?: string;
+        }
+
+        interface BuilderOptions {
+            doctype?: any;
+            headless?: boolean;
+            indent?: string;
+            newline?: string;
+            pretty?: boolean;
+            renderOpts?: RenderOptions;
+            rootName?: string;
+            xmldec?: XMLDeclarationOptions;
+        }
+
+        interface Options {
+            async?: boolean;
+            attrkey?: string;
+            attrNameProcessors?: (name: string) => string;
+            charkey?: string;
+            charsAsChildren?: boolean;
+            childkey?: string;
+            emptyTag?: any;
+            explicitArray?: boolean;
+            explicitCharkey?: boolean;
+            explicitChildren?: boolean;
+            explicitRoot?: boolean;
+            ignoreAttrs?: boolean;
+            mergeAttrs?: boolean;
+            normalize?: boolean;
+            normalizeTags?: boolean;
+            strict?: boolean;
+            tagNameProcessors?: (name: string) => string;
+            trim?: boolean;
+            validator?: Function;
+            xmlns?: boolean;
+        }
     }
 }