diff --git a/lib/active_interaction/extras/model_fields.rb b/lib/active_interaction/extras/model_fields.rb
index cc7438b..1948b7f 100644
--- a/lib/active_interaction/extras/model_fields.rb
+++ b/lib/active_interaction/extras/model_fields.rb
@@ -81,14 +81,18 @@ def given_model_fields(model_name)
   # the one on the model
   def any_changed?(*fields)
     fields.any? do |field|
-      if inputs.given?(field)
-        model_field = self.class.model_field_cache_inverse[field]
-
-        if model_field
-          send(model_field).send(field) != send(field)
-        else
+      model_field = self.class.model_field_cache_inverse[field]
+      if model_field
+        model = send(model_field)
+        if model.new_record?
           true
+        elsif inputs.given?(field)
+          model.send(field) != send(field)
+        else
+          false
         end
+      else
+        inputs.given?(field)
       end
     end
   end