diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index f78dbb9..2eaee8b 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -331,6 +331,15 @@ module ApplicationHelper
     s.html_safe
   end
 
+  # Options for the new membership projects combo-box
+  def options_for_membership_project_select(principal, projects)
+    options = content_tag('option', "--- #{l(:actionview_instancetag_blank_option)} ---")
+    options << project_tree_options_for_select(projects) do |p|
+      {:disabled => principal.projects.include?(p)}
+    end
+    options
+  end
+
   # Truncates and returns the string as a single line
   def truncate_single_line(string, *args)
     truncate(string.to_s, *args).gsub(%r{[\r\n]+}m, ' ')
diff --git a/app/helpers/groups_helper.rb b/app/helpers/groups_helper.rb
index 3f6c679..0548153 100644
--- a/app/helpers/groups_helper.rb
+++ b/app/helpers/groups_helper.rb
@@ -18,15 +18,6 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 module GroupsHelper
-  # Options for the new membership projects combo-box
-  def options_for_membership_project_select(user, projects)
-    options = content_tag('option', "--- #{l(:actionview_instancetag_blank_option)} ---")
-    options << project_tree_options_for_select(projects) do |p|
-      {:disabled => (user.projects.include?(p))}
-    end
-    options
-  end
-
   def group_settings_tabs
     tabs = [{:name => 'general', :partial => 'groups/general', :label => :label_general},
             {:name => 'users', :partial => 'groups/users', :label => :label_user_plural},
diff --git a/app/helpers/users_helper.rb b/app/helpers/users_helper.rb
index a264854..e93d308 100644
--- a/app/helpers/users_helper.rb
+++ b/app/helpers/users_helper.rb
@@ -26,15 +26,6 @@ module UsersHelper
                         ["#{l(:status_locked)} (#{user_count_by_status[3].to_i})", '3']], selected.to_s)
   end
 
-  # Options for the new membership projects combo-box
-  def options_for_membership_project_select(user, projects)
-    options = content_tag('option', "--- #{l(:actionview_instancetag_blank_option)} ---")
-    options << project_tree_options_for_select(projects) do |p|
-      {:disabled => (user.projects.include?(p))}
-    end
-    options
-  end
-
   def user_mail_notification_options(user)
     user.valid_notification_options.collect {|o| [l(o.last), o.first]}
   end