diff --git a/hapi/hapi-tests.ts b/hapi/hapi-tests.ts
index 0589036371..c0f8d9f6e0 100644
--- a/hapi/hapi-tests.ts
+++ b/hapi/hapi-tests.ts
@@ -21,6 +21,12 @@ plugin.register.attributes = {
 	version: "1.0.0"
 };
 
+// optional options parameter
+server.register({}, function (err) {});
+
+// optional options.routes.vhost parameter 
+server.register({}, { select: 'api', routes: { prefix: '/prefix' } }, function (err) {});
+
 //server.pack.register(plugin, (err: Object) => {
 //	if (err) { throw err; }
 //});
diff --git a/hapi/hapi.d.ts b/hapi/hapi.d.ts
index 61a2ef2d5a..be2bf9665b 100644
--- a/hapi/hapi.d.ts
+++ b/hapi/hapi.d.ts
@@ -2051,11 +2051,13 @@ declare module "hapi" {
 		register(plugins: any|any[], options: {
 			select: string|string[];
 			routes: {
-				prefix: string; vhost: string|string[]
+				prefix: string; vhost?: string|string[]
 			};
 		}
 			, callback: (err: any) => void):void;
 
+		register(plugins: any|any[], callback: (err: any) => void):void;
+
 		/**server.render(template, context, [options], callback)
 		Utilizes the server views manager to render a template where:
 		template - the template filename and path, relative to the views manager templates path (path or relativeTo).