diff --git a/app/controllers/investments_controller.rb b/app/controllers/investments_controller.rb
index 1ef7d144b..5fa25f123 100644
--- a/app/controllers/investments_controller.rb
+++ b/app/controllers/investments_controller.rb
@@ -1,3 +1,5 @@
 class InvestmentsController < ApplicationController
   include AccountableResource
+
+  permitted_accountable_attributes :id, :subtype
 end
diff --git a/app/views/investments/_form.html.erb b/app/views/investments/_form.html.erb
index 4fc706e33..be4004d27 100644
--- a/app/views/investments/_form.html.erb
+++ b/app/views/investments/_form.html.erb
@@ -1,7 +1,9 @@
 <%# locals: (account:, url:) %>
 
 <%= render "accounts/form", account: account, url: url do |form| %>
-  <%= form.select :subtype,
-                 grouped_options_for_select(Investment.subtypes_grouped_for_select(currency: Current.family.currency), account.subtype),
-                 { label: true, prompt: t("investments.form.subtype_prompt"), include_blank: t("investments.form.none") } %>
+  <%= form.fields_for :accountable do |investment_form| %>
+    <%= investment_form.select :subtype,
+                       grouped_options_for_select(Investment.subtypes_grouped_for_select(currency: Current.family.currency), account.accountable.subtype),
+                       { label: true, prompt: t("investments.form.subtype_prompt"), include_blank: t("investments.form.none") } %>
+  <% end %>
 <% end %>