diff --git a/app/controllers/management/mime_types_controller.rb b/app/controllers/management/mime_types_controller.rb
index dd36e2c9e268644eebb427173af16ae15bda854f..66e81d491fd13df5a27a55e91b99bd6e36b10b5d 100644
--- a/app/controllers/management/mime_types_controller.rb
+++ b/app/controllers/management/mime_types_controller.rb
@@ -64,6 +64,6 @@ class Management::MimeTypesController < ManagementController
 
     # Never trust parameters from the scary internet, only allow the white list through.
     def mime_type_params
-      params.fetch(:management_mime_type, {})
+      params.require(:mime_type).permit(:extension, :mime_type)
     end
 end