diff --git a/django/db/models/fields/__init__.py b/django/db/models/fields/__init__.py
index 74b08884da..795f8936bd 100644
--- a/django/db/models/fields/__init__.py
+++ b/django/db/models/fields/__init__.py
@@ -848,6 +848,7 @@ class ImageField(FileField):
 
     def formfield(self, **kwargs):
         defaults = {'form_class': forms.ImageField}
+        defaults.update(kwargs)
         return super(ImageField, self).formfield(**defaults)
 
 class IntegerField(Field):