diff --git a/lib/generators/active_admin/devise/devise_generator.rb b/lib/generators/active_admin/devise/devise_generator.rb
index b3c2f814218..3b7daa6a766 100644
--- a/lib/generators/active_admin/devise/devise_generator.rb
+++ b/lib/generators/active_admin/devise/devise_generator.rb
@@ -31,7 +31,7 @@ def remove_registerable_from_model
 
       def set_namespace_for_path
         routes_file = File.join(destination_root, "config", "routes.rb")
-        gsub_file routes_file, /devise_for :#{table_name}/, "devise_for :#{table_name}, ActiveAdmin::Devise.config"
+        gsub_file routes_file, /devise_for :#{plural_table_name}/, "devise_for :#{plural_table_name}, ActiveAdmin::Devise.config"
       end
 
       def add_default_user_to_migration