diff --git a/lib/mongoid_acts_as_tree.rb b/lib/mongoid_acts_as_tree.rb
index 4b2ace6..bc75a02 100644
--- a/lib/mongoid_acts_as_tree.rb
+++ b/lib/mongoid_acts_as_tree.rb
@@ -131,7 +131,11 @@ def children=(new_children_list)
 				alias replace children=
 
 				def descendants
-					return [] if new_record?
+					# workorund for mongoid unexpected behavior
+					_new_record_var = self.instance_variable_get(:@new_record)
+					_new_record = _new_record_var != false
+
+					return [] if _new_record
 					self.class.all_in(path_field => [self._id]).order_by tree_order
 				end