diff --git a/types/angular/jqlite.d.ts b/types/angular/jqlite.d.ts
index 4760e520fb..6a486b5452 100644
--- a/types/angular/jqlite.d.ts
+++ b/types/angular/jqlite.d.ts
@@ -644,6 +644,9 @@ interface JQuery {
      */
     wrap(func: (index: number) => string | JQuery): JQuery;
 
+    // Undocumented
+    length: number;
+
     // TODO: events, how to define?
     // $destroy