diff --git a/lib/redmine_dmsf/patches/project_patch.rb b/lib/redmine_dmsf/patches/project_patch.rb
index 0e387417..cae7be20 100644
--- a/lib/redmine_dmsf/patches/project_patch.rb
+++ b/lib/redmine_dmsf/patches/project_patch.rb
@@ -67,7 +67,7 @@ module RedmineDmsf
           project = project.is_a?(Project) ? project : Project.find(project)
 
           to_be_copied = %w(dmsf approval_workflows)
-          to_be_copied = to_be_copied & options[:only].to_a if options[:only].present?
+          to_be_copied = to_be_copied & Array.wrap(options[:only]) unless options[:only].nil?
 
           if save
             to_be_copied.each do |name|