diff --git a/lib/redmine_dmsf.rb b/lib/redmine_dmsf.rb
index 676b3ea4..e7c39b1a 100644
--- a/lib/redmine_dmsf.rb
+++ b/lib/redmine_dmsf.rb
@@ -41,7 +41,7 @@ require File.dirname(__FILE__) + '/redmine_dmsf/patches/queries_controller_patch
 require File.dirname(__FILE__) + '/redmine_dmsf/patches/pdf_patch'
 
 # A workaround for obsolete 'alias_method' usage in RedmineUp's plugins
-if RedmineDmsf::Plugin.an_osolete_plugin_present?
+if RedmineDmsf::Plugin.an_osolete_plugin_present? && !Redmine::Plugin.installed?(:easy_extensions)
   require File.dirname(__FILE__) + '/redmine_dmsf/patches/notifiable_ru_patch'
 else
   require File.dirname(__FILE__) + '/redmine_dmsf/patches/notifiable_patch'