diff --git a/src/controllers/organisms/MemberList.js b/src/controllers/organisms/MemberList.js
index 5bfe61ca01..8f55b4fb1d 100644
--- a/src/controllers/organisms/MemberList.js
+++ b/src/controllers/organisms/MemberList.js
@@ -47,7 +47,7 @@ module.exports = {
         });
     },
 
-    roomMembers() {
+    roomMembers: function() {
         var cli = MatrixClientPeg.get();
         var all_members = cli.getRoom(this.props.roomId).currentState.members;
         var all_user_ids = Object.keys(all_members);