diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 74f4aef2..4cc67139 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -46,7 +46,7 @@ class ApplicationController < ActionController::Base
   include Redmine::MenuManager::MenuController
   helper Redmine::MenuManager::MenuHelper
   
-  REDMINE_SUPPORTED_SCM.each do |scm|
+  Redmine::Scm::Base.all.each do |scm|
     require_dependency "repository/#{scm.underscore}"
   end
 
diff --git a/app/helpers/repositories_helper.rb b/app/helpers/repositories_helper.rb
index 0e0f94c7..0c2a4480 100644
--- a/app/helpers/repositories_helper.rb
+++ b/app/helpers/repositories_helper.rb
@@ -126,7 +126,7 @@ module RepositoriesHelper
   
   def scm_select_tag(repository)
     scm_options = [["--- #{l(:actionview_instancetag_blank_option)} ---", '']]
-    REDMINE_SUPPORTED_SCM.each do |scm|
+    Redmine::Scm::Base.all.each do |scm|
       scm_options << ["Repository::#{scm}".constantize.scm_name, scm] if Setting.enabled_scm.include?(scm) || (repository && repository.class.name.demodulize == scm)
     end
     
diff --git a/app/views/settings/_repositories.rhtml b/app/views/settings/_repositories.rhtml
index 581ebf5f..198b8328 100644
--- a/app/views/settings/_repositories.rhtml
+++ b/app/views/settings/_repositories.rhtml
@@ -13,7 +13,7 @@
   <%= link_to_function l(:label_generate_key), "if ($('settings_sys_api_key').disabled == false) { $('settings_sys_api_key').value = randomKey(20) }" %>
 </p>
 
-<p><%= setting_multiselect(:enabled_scm, REDMINE_SUPPORTED_SCM) %></p>
+<p><%= setting_multiselect(:enabled_scm, Redmine::Scm::Base.all) %></p>
 
 <p><%= setting_text_field :repositories_encodings, :size => 60 %><br />
 <em><%= l(:text_comma_separated) %></em></p>
diff --git a/lib/redmine.rb b/lib/redmine.rb
index 573692ff..d9a1f406 100644
--- a/lib/redmine.rb
+++ b/lib/redmine.rb
@@ -7,6 +7,7 @@ require 'redmine/themes'
 require 'redmine/hook'
 require 'redmine/plugin'
 require 'redmine/wiki_formatting'
+require 'redmine/scm/base'
 
 begin
   require_library_or_gem 'RMagick' unless Object.const_defined?(:Magick)
@@ -21,7 +22,13 @@ else
   FCSV = CSV
 end
 
-REDMINE_SUPPORTED_SCM = %w( Subversion Darcs Mercurial Cvs Bazaar Git Filesystem )
+Redmine::Scm::Base.add "Subversion"
+Redmine::Scm::Base.add "Darcs"
+Redmine::Scm::Base.add "Mercurial"
+Redmine::Scm::Base.add "Cvs"
+Redmine::Scm::Base.add "Bazaar"
+Redmine::Scm::Base.add "Git"
+Redmine::Scm::Base.add "Filesystem"
 
 # Permissions
 Redmine::AccessControl.map do |map|
diff --git a/lib/redmine/scm/base.rb b/lib/redmine/scm/base.rb
new file mode 100644
index 00000000..43e8a187
--- /dev/null
+++ b/lib/redmine/scm/base.rb
@@ -0,0 +1,23 @@
+module Redmine
+  module Scm
+    class Base
+      class << self
+
+        def all
+          @scms
+        end
+
+        # Add a new SCM adapter and repository
+        def add(scm_name)
+          @scms ||= []
+          @scms << scm_name
+        end
+
+        # Remove a SCM adapter from Redmine's list of supported scms
+        def delete(scm_name)
+          @scms.delete(scm_name)
+        end
+      end
+    end
+  end
+end