diff --git a/app/views/units/_form.html.erb b/app/views/units/_form.html.erb
index f8a200e..474b070 100644
--- a/app/views/units/_form.html.erb
+++ b/app/views/units/_form.html.erb
@@ -10,7 +10,6 @@
     </td>
     <td class="number">
       <% unless @unit.base.nil? %>
-        <%= form.hidden_field :base_id %>
         <%= form.number_field :multiplier, required: true, size: 10, min: :step %>
       <% end %>
     </td>
diff --git a/app/views/units/new.turbo_stream.erb b/app/views/units/new.turbo_stream.erb
index 0c48189..697a65f 100644
--- a/app/views/units/new.turbo_stream.erb
+++ b/app/views/units/new.turbo_stream.erb
@@ -7,7 +7,8 @@
 <%= turbo_stream.disable ids[:link] -%>
 
 <%= turbo_stream.append :unit_form do %>
-  <%- tabular_form_with model: @unit, html: {id: ids[:form_tag]} do %>
+  <%- tabular_form_with model: @unit, html: {id: ids[:form_tag]} do |form| %>
+    <%= form.hidden_field :base_id unless @unit.base.nil? %>
   <% end %>
 <% end %>