diff --git a/packages/common/http/src/xhr.ts b/packages/common/http/src/xhr.ts
index 11e0fd544e..1dc006a463 100644
--- a/packages/common/http/src/xhr.ts
+++ b/packages/common/http/src/xhr.ts
@@ -79,9 +79,10 @@ export class HttpXhrBackend implements HttpBackend {
    */
   handle(req: HttpRequest<any>): Observable<HttpEvent<any>> {
     // Quick check to give a better error message when a user attempts to use
-    // HttpClient.jsonp() without installing the JsonpClientModule
+    // HttpClient.jsonp() without installing the HttpClientJsonpModule
     if (req.method === 'JSONP') {
-      throw new Error(`Attempted to construct Jsonp request without JsonpClientModule installed.`);
+      throw new Error(
+          `Attempted to construct Jsonp request without HttpClientJsonpModule installed.`);
     }
 
     // Everything happens on Observable subscription.