diff --git a/lib/sync.js b/lib/sync.js
index efae7149d..2735beedd 100644
--- a/lib/sync.js
+++ b/lib/sync.js
@@ -180,6 +180,7 @@ function _resolveInvites(client, room) {
 /**
  * <b>Internal class - unstable.</b>
  * Construct an entity which is able to sync with a homeserver.
+ * @constructor
  * @param {MatrixClient} client The matrix client instance to use.
  */
 function SyncApi(client) {