diff --git a/activerecord/lib/active_record/association_preload.rb b/activerecord/lib/active_record/association_preload.rb
index a3d1f12b0342e80916f40d236b73a5f28738546e..49f527039630e94f07f767b5caa2d5d99ad9e0f3 100644
--- a/activerecord/lib/active_record/association_preload.rb
+++ b/activerecord/lib/active_record/association_preload.rb
@@ -103,10 +103,10 @@ def preload_has_and_belongs_to_many_association(records, reflection, preload_opt
         associated_records = reflection.klass.find(:all, :conditions => [conditions, ids],
         :include => options[:include],
         :joins => "INNER JOIN #{connection.quote_table_name options[:join_table]} as t0 ON #{reflection.klass.quoted_table_name}.#{reflection.klass.primary_key} = t0.#{reflection.association_foreign_key}",
-        :select => "#{options[:select] || table_name+'.*'}, t0.#{reflection.primary_key_name} as _parent_record_id",
+        :select => "#{options[:select] || table_name+'.*'}, t0.#{reflection.primary_key_name} as the_parent_record_id",
         :order => options[:order])
 
-        set_association_collection_records(id_to_record_map, reflection.name, associated_records, '_parent_record_id')
+        set_association_collection_records(id_to_record_map, reflection.name, associated_records, 'the_parent_record_id')
       end
 
       def preload_has_one_association(records, reflection, preload_options={})