1 files changed, 1 insertions, 1 deletions
diff --git a/src/http.ts b/src/http.ts
index 895b10973..a102b3973 100644
--- a/src/http.ts
+++ b/src/http.ts
@@ -44,7 +44,7 @@ export interface HttpRequestLibrary {
  * An implementation of the [[HttpRequestLibrary]] using the
  * browser's XMLHttpRequest.
  */
-export class BrowserHttpLib {
+export class BrowserHttpLib implements HttpRequestLibrary {
   private req(method: string,
               url: string,
               options?: any): Promise<HttpResponse> {