diff --git a/app/models/project.rb b/app/models/project.rb
index e2b7a9d9e..d4f29453a 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -961,7 +961,7 @@ class Project < ActiveRecord::Base
 
   def allowed_permissions
     @allowed_permissions ||= begin
-      module_names = enabled_modules.pluck(:name)
+      module_names = enabled_modules.loaded? ? enabled_modules.map(&:name) : enabled_modules.pluck(:name)
       Redmine::AccessControl.modules_permissions(module_names).collect {|p| p.name}
     end
   end