diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index 5a4f04a5b..ea3bdd06e 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -185,6 +185,9 @@ class Field(object):
         Given and object and a field name, returns the value that should be
         serialized for that field.
         """
+        if obj is None and self.default is not None:
+            return self.default
+
         if obj is None:
             return self.empty
 
diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py
index 40caa1f38..764b2d31c 100644
--- a/rest_framework/serializers.py
+++ b/rest_framework/serializers.py
@@ -323,6 +323,8 @@ class BaseSerializer(WritableField):
             field.initialize(parent=self, field_name=field_name)
             key = self.get_field_key(field_name)
             value = field.field_to_native(obj, field_name)
+            if value == None and hasattr(field, 'default'):
+                value = field.default
             method = getattr(self, 'transform_%s' % field_name, None)
             if callable(method):
                 value = method(obj, value)
diff --git a/rest_framework/tests/test_serializer.py b/rest_framework/tests/test_serializer.py
index eca467ee2..d5ee3c6a7 100644
--- a/rest_framework/tests/test_serializer.py
+++ b/rest_framework/tests/test_serializer.py
@@ -1743,3 +1743,38 @@ class TestSerializerTransformMethods(TestCase):
                 'b_renamed': None,
             }
         )
+class DefaultTrueBooleanModel(models.Model):
+    cat = models.BooleanField(default=True)
+    dog = models.BooleanField(default=False)
+
+class SerializerDefaultTrueBoolean(TestCase):
+
+    def setUp(self):
+        super(SerializerDefaultTrueBoolean, self).setUp()
+
+        class DefaultTrueBooleanSerializer(serializers.ModelSerializer):
+            class Meta:
+                model = DefaultTrueBooleanModel
+                fields = ('cat', 'dog')
+
+        self.default_true_boolean_serializer = DefaultTrueBooleanSerializer
+
+    def test_blank_input(self):
+        serializer = self.default_true_boolean_serializer()
+        self.assertEqual(serializer.data['cat'], True)
+        self.assertEqual(serializer.data['dog'], False)
+
+    def test_enabled_as_false(self):
+        serializer = self.default_true_boolean_serializer({'cat': False, 'dog': False})
+        self.assertEqual(serializer.data['cat'], False)
+        self.assertEqual(serializer.data['dog'], False)
+
+    def test_enabled_as_true(self):
+        serializer = self.default_true_boolean_serializer({'cat': True, 'dog': True})
+        self.assertEqual(serializer.data['cat'], True)
+        self.assertEqual(serializer.data['dog'], True)
+
+    def test_enabled_partial(self):
+        serializer = self.default_true_boolean_serializer({'cat': False})
+        self.assertEqual(serializer.data['cat'], False)
+        self.assertEqual(serializer.data['dog'], False)