diff --git a/lib/redmine_dmsf.rb b/lib/redmine_dmsf.rb
index f16d8f5a..676b3ea4 100644
--- a/lib/redmine_dmsf.rb
+++ b/lib/redmine_dmsf.rb
@@ -41,8 +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.present?(:redmine_questions) || Redmine::Plugin.installed?(:redmine_contacts) ||
-  Redmine::Plugin.installed?(:redmine_checklists)) &&  !Redmine::Plugin.installed?(:easy_extensions)
+if RedmineDmsf::Plugin.an_osolete_plugin_present?
   require File.dirname(__FILE__) + '/redmine_dmsf/patches/notifiable_ru_patch'
 else
   require File.dirname(__FILE__) + '/redmine_dmsf/patches/notifiable_patch'
diff --git a/lib/redmine_dmsf/patches/notifiable_patch.rb b/lib/redmine_dmsf/patches/notifiable_patch.rb
index a61a812a..c14530d0 100644
--- a/lib/redmine_dmsf/patches/notifiable_patch.rb
+++ b/lib/redmine_dmsf/patches/notifiable_patch.rb
@@ -55,7 +55,6 @@ end
 if Redmine::Plugin.installed?(:easy_extensions)
   RedmineExtensions::PatchManager.register_patch_to_be_first 'Redmine::Notifiable',
     'RedmineDmsf::Patches::NotifiablePatch', prepend: true, first: true
-elsif(!(RedmineDmsf::Plugin.present?(:redmine_questions) || Redmine::Plugin.installed?(:redmine_contacts) ||
-  Redmine::Plugin.installed?(:redmine_checklists)))
+elsif(!RedmineDmsf::Plugin.an_osolete_plugin_present?)
   Redmine::Notifiable.prepend RedmineDmsf::Patches::NotifiablePatch
 end
diff --git a/lib/redmine_dmsf/plugin.rb b/lib/redmine_dmsf/plugin.rb
index 1b7dd974..dd022e35 100644
--- a/lib/redmine_dmsf/plugin.rb
+++ b/lib/redmine_dmsf/plugin.rb
@@ -29,5 +29,19 @@ module RedmineDmsf
       Dir.exist? File.join(Rails.root, 'plugins', id.to_s)
     end
 
+    # Return true if a plugin that overrides Redmine::Notifiable and use the deprecated method alias_method_chain is
+    # present.
+    # It is related especially to plugins made by AplhaNode and RedmineUP.
+    def self.an_osolete_plugin_present?
+      plugins = %w(questions contacts checklists db passwords)
+      plugins.each do|plugin|
+        if Plugin.present?("redmine_#{plugin}")
+          return true
+        end
+      end
+      return false
+    end
+
   end
+
 end
diff --git a/test/unit/lib/redmine_dmsf/dmsf_plugin_test.rb b/test/unit/lib/redmine_dmsf/dmsf_plugin_test.rb
index 92484476..f1a94450 100644
--- a/test/unit/lib/redmine_dmsf/dmsf_plugin_test.rb
+++ b/test/unit/lib/redmine_dmsf/dmsf_plugin_test.rb
@@ -31,4 +31,17 @@ class DmsfPluginTest < RedmineDmsf::Test::HelperTest
     assert !RedmineDmsf::Plugin.present?(:redmine_dmsfx)
   end
 
+  def test_an_osolete_plugin_present_no
+    # No such plugin is present
+    assert !RedmineDmsf::Plugin.an_osolete_plugin_present?
+  end
+
+  def test_an_osolete_plugin_present_yes
+    # Create a fake redmine_checklists plugin
+    path = File.join(Rails.root, 'plugins', 'redmine_checklists')
+    Dir.mkdir(path) unless Dir.exist?(path)
+    assert RedmineDmsf::Plugin.an_osolete_plugin_present?
+    Dir.rmdir(path) if Dir.exist?(path)
+  end
+
 end