diff --git a/src/observable/dom/AjaxObservable.ts b/src/observable/dom/AjaxObservable.ts
index b5e2e0365b..a8178461a4 100644
--- a/src/observable/dom/AjaxObservable.ts
+++ b/src/observable/dom/AjaxObservable.ts
@@ -66,6 +66,7 @@ export interface AjaxCreationMethod {
   get(url: string, headers?: Object): Observable<AjaxResponse>;
   post(url: string, body?: any, headers?: Object): Observable<AjaxResponse>;
   put(url: string, body?: any, headers?: Object): Observable<AjaxResponse>;
+  patch(url: string, body?: any, headers?: Object): Observable<AjaxResponse>;
   delete(url: string, headers?: Object): Observable<AjaxResponse>;
   getJSON<T>(url: string, headers?: Object): Observable<T>;
 }
@@ -86,6 +87,10 @@ export function ajaxPut(url: string, body?: any, headers?: Object): Observable<A
   return new AjaxObservable<AjaxResponse>({ method: 'PUT', url, body, headers });
 };
 
+export function ajaxPatch(url: string, body?: any, headers?: Object): Observable<AjaxResponse> {
+  return new AjaxObservable<AjaxResponse>({ method: 'PATCH', url, body, headers });
+};
+
 export function ajaxGetJSON<T>(url: string, headers?: Object): Observable<T> {
   return new AjaxObservable<AjaxResponse>({ method: 'GET', url, responseType: 'json', headers })
     .lift<T>(new MapOperator<AjaxResponse, T>((x: AjaxResponse, index: number): T => x.response, null));
@@ -132,6 +137,7 @@ export class AjaxObservable<T> extends Observable<T> {
     create.post = ajaxPost;
     create.delete = ajaxDelete;
     create.put = ajaxPut;
+    create.patch = ajaxPatch;
     create.getJSON = ajaxGetJSON;
 
     return <AjaxCreationMethod>create;