diff --git a/django/core/meta/__init__.py b/django/core/meta/__init__.py
index 5507bd0272..eaa69b960b 100644
--- a/django/core/meta/__init__.py
+++ b/django/core/meta/__init__.py
@@ -1734,7 +1734,7 @@ def manipulator_init(opts, add, change, self, obj_key=None, follow=None):
                 # Sanity check -- Make sure the "parent" object exists.
                 # For example, make sure the Place exists for the Restaurant.
                 # Let the ObjectDoesNotExist exception propagate up.
-                lookup_kwargs = opts.one_to_one_field.rel.limit_choices_to
+                lookup_kwargs = opts.one_to_one_field.rel.limit_choices_to.copy()
                 lookup_kwargs['%s__exact' % opts.one_to_one_field.rel.field_name] = obj_key
                 _ = opts.one_to_one_field.rel.to.get_model_module().get_object(**lookup_kwargs)
                 params = dict([(f.attname, f.get_default()) for f in opts.fields])