diff --git a/app/helpers/auth_messages_helper.rb b/app/helpers/auth_messages_helper.rb
index 116ea654..012891e6 100644
--- a/app/helpers/auth_messages_helper.rb
+++ b/app/helpers/auth_messages_helper.rb
@@ -1,6 +1,5 @@
 module AuthMessagesHelper
-  def auth_messages(form = nil)
-    render "shared/auth_messages", flash: flash,
-      errors: form&.object&.errors&.full_messages || []
+  def auth_messages(form)
+    render "shared/auth_messages", flash: flash, errors: form.object.errors.full_messages
   end
 end