diff --git a/app/forms/decidim/debates/close_debate_form.rb b/app/forms/decidim/debates/close_debate_form.rb
index 8e632772cf..0faf04b2fb 100644
--- a/app/forms/decidim/debates/close_debate_form.rb
+++ b/app/forms/decidim/debates/close_debate_form.rb
@@ -7,7 +7,6 @@ class CloseDebateForm < Decidim::Form
       mimic :debate
 
       attribute :conclusions, Decidim::Attributes::CleanString
-      attribute :debate, Debate
 
       validates :debate, presence: true
       validates :conclusions, presence: true, length: { minimum: 10, maximum: 10_000 }
@@ -19,7 +18,6 @@ def closed_at
 
       def map_model(debate)
         super
-        self.debate = debate
 
         # Debates can be translated in different languages from the admin but
         # the public form doesn't allow it. When a user closes a debate the
@@ -31,6 +29,10 @@ def map_model(debate)
                            end
       end
 
+      def debate
+        @debate ||= Debate.find_by(id: id)
+      end
+
       private
 
       def user_can_close_debate