diff --git a/app/models/user.rb b/app/models/user.rb
index dd90c14e..29c8b05f 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -97,6 +97,8 @@ class User < ApplicationRecord
 
   # Returns a list of rooms ordered by last session (with nil rooms last)
   def ordered_rooms
+    return [] if main_room.nil?
+
     [main_room] + rooms.where.not(id: main_room.id).order(Arel.sql("last_session IS NULL, last_session desc"))
   end