diff --git a/actionpack/lib/action_view/helpers/form_helper.rb b/actionpack/lib/action_view/helpers/form_helper.rb
index 3ebc6601e59f71f148c5ac9f768234edd9cbd912..8bae6d27964aa452b181215bb102a95252e7a218 100644
--- a/actionpack/lib/action_view/helpers/form_helper.rb
+++ b/actionpack/lib/action_view/helpers/form_helper.rb
@@ -1237,7 +1237,7 @@ def submit(value=nil, options={})
       end
 
       def emitted_hidden_id?
-        @emitted_hidden_id
+        @emitted_hidden_id ||= nil
       end
 
       private