diff --git a/django/db/models/fields/__init__.py b/django/db/models/fields/__init__.py
index bc41911ca3..5669530aa5 100644
--- a/django/db/models/fields/__init__.py
+++ b/django/db/models/fields/__init__.py
@@ -401,7 +401,13 @@ class BooleanField(Field):
         return bool(value)
 
     def formfield(self, **kwargs):
-        defaults = {'form_class': forms.BooleanField}
+        # Unlike most fields, BooleanField figures out include_blank from
+        # self.null instead of self.blank.
+        if self.choices:
+            include_blank = self.null or not (self.has_default() or 'initial' in kwargs)
+            defaults = {'choices': self.get_choices(include_blank=include_blank)}
+        else:
+            defaults = {'form_class': forms.BooleanField}
         defaults.update(kwargs)
         return super(BooleanField, self).formfield(**defaults)
 
diff --git a/tests/regressiontests/model_fields/tests.py b/tests/regressiontests/model_fields/tests.py
index ec52668e60..3d232ffeee 100644
--- a/tests/regressiontests/model_fields/tests.py
+++ b/tests/regressiontests/model_fields/tests.py
@@ -1,6 +1,7 @@
 import datetime
 import unittest
 import django.test
+from django import forms
 from django.db import models
 from django.core.exceptions import ValidationError
 from models import Foo, Bar, Whiz, BigD, BigS
@@ -83,10 +84,22 @@ class BooleanFieldTests(unittest.TestCase):
 
     def test_booleanfield_get_db_prep_lookup(self):
         self._test_get_db_prep_lookup(models.BooleanField())
-        
+
     def test_nullbooleanfield_get_db_prep_lookup(self):
         self._test_get_db_prep_lookup(models.NullBooleanField())
 
+    def test_booleanfield_choices_blank(self):
+        """
+        Test that BooleanField with choices and defaults doesn't generate a
+        formfield with the blank option (#9640, #10549).
+        """
+        choices = [(1, u'Si'), (2, 'No')]
+        f = models.BooleanField(choices=choices, default=1, null=True)
+        self.assertEqual(f.formfield().choices, [('', '---------')] + choices)
+
+        f = models.BooleanField(choices=choices, default=1, null=False)
+        self.assertEqual(f.formfield().choices, choices)
+
 class ChoicesTests(django.test.TestCase):
     def test_choices_and_field_display(self):
         """