diff --git a/app/controllers/platforms/mass_builds_controller.rb b/app/controllers/platforms/mass_builds_controller.rb
index e9b866103..c12d82768 100644
--- a/app/controllers/platforms/mass_builds_controller.rb
+++ b/app/controllers/platforms/mass_builds_controller.rb
@@ -12,8 +12,7 @@ class Platforms::MassBuildsController < Platforms::BaseController
   def create
     mass_build = @platform.mass_builds.new(:arches => params[:arches],
       :auto_publish => params[:auto_publish] || false,
-      :projects_list => params[:projects_list],
-      :new_core => params[:new_core])
+      :projects_list => params[:projects_list])
     mass_build.user = current_user
     authorize! :create, mass_build
 
diff --git a/app/models/mass_build.rb b/app/models/mass_build.rb
index 7feb00fb9..3257ab6c8 100644
--- a/app/models/mass_build.rb
+++ b/app/models/mass_build.rb
@@ -7,7 +7,7 @@ class MassBuild < ActiveRecord::Base
   scope :outdated, where('created_at < ?', Time.now + 1.day - BuildList::MAX_LIVE_TIME)
 
   attr_accessor :arches
-  attr_accessible :arches, :auto_publish, :projects_list, :new_core
+  attr_accessible :arches, :auto_publish, :projects_list
 
   validates :platform_id, :arch_names, :name, :user_id, :projects_list, :presence => true
   validates_inclusion_of :auto_publish, :in => [true, false]
@@ -38,7 +38,7 @@ class MassBuild < ActiveRecord::Base
           return if self.reload.stop_build
           arches_list.each do |arch|
             rep = (project.repositories & platform.repositories).first
-            project.build_for(platform, rep.id, user, arch, auto_publish, self.id, 0, new_core)
+            project.build_for(platform, rep.id, user, arch, auto_publish, self.id, 0)
           end
         rescue RuntimeError, Exception
         end
@@ -47,7 +47,6 @@ class MassBuild < ActiveRecord::Base
         list = (missed_projects_list || '') << "#{name}\n"
         update_column :missed_projects_list, list
       end
-      sleep 1 unless new_core
     end
   end
   later :build_all, :queue => :clone_build
diff --git a/app/models/project.rb b/app/models/project.rb
index 404347b00..b9a795d45 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -130,7 +130,7 @@ class Project < ActiveRecord::Base
     #path #share by NFS
   end
 
-  def build_for(platform, repository_id, user, arch =  Arch.find_by_name('i586'), auto_publish = false, mass_build_id = nil, priority = 0, new_core = false)
+  def build_for(platform, repository_id, user, arch =  Arch.find_by_name('i586'), auto_publish = false, mass_build_id = nil, priority = 0)
     # Select main and project platform repository(contrib, non-free and etc)
     # If main does not exist, will connect only project platform repository
     # If project platform repository is main, only main will be connect
@@ -151,7 +151,6 @@ class Project < ActiveRecord::Base
       bl.priority = priority
       bl.mass_build_id = mass_build_id
       bl.save_to_repository_id = repository_id
-      bl.new_core = new_core
     end
     build_list.save
   end