diff --git a/django/contrib/localflavor/us/forms.py b/django/contrib/localflavor/us/forms.py
index a744edce74..5b24cde581 100644
--- a/django/contrib/localflavor/us/forms.py
+++ b/django/contrib/localflavor/us/forms.py
@@ -3,7 +3,7 @@ USA-specific Form helpers
 """
 
 from django.forms import ValidationError
-from django.forms.fields import Field, RegexField, Select, EMPTY_VALUES
+from django.forms.fields import Field, RegexField, Select, EMPTY_VALUES, CharField
 from django.utils.encoding import smart_unicode
 from django.utils.translation import ugettext_lazy as _
 import re
@@ -20,7 +20,7 @@ class USZipCodeField(RegexField):
         super(USZipCodeField, self).__init__(r'^\d{5}(?:-\d{4})?$',
             max_length=None, min_length=None, *args, **kwargs)
 
-class USPhoneNumberField(Field):
+class USPhoneNumberField(CharField):
     default_error_messages = {
         'invalid': u'Phone numbers must be in XXX-XXX-XXXX format.',
     }
diff --git a/django/contrib/localflavor/us/models.py b/django/contrib/localflavor/us/models.py
index 4cb6e6851e..1f78e4504a 100644
--- a/django/contrib/localflavor/us/models.py
+++ b/django/contrib/localflavor/us/models.py
@@ -1,6 +1,6 @@
 from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
-from django.db.models.fields import Field, CharField
+from django.db.models.fields import CharField
 from django.contrib.localflavor.us.us_states import STATE_CHOICES
 
 class USStateField(CharField):
@@ -12,22 +12,16 @@ class USStateField(CharField):
         kwargs['max_length'] = 2
         super(USStateField, self).__init__(*args, **kwargs)
 
-class PhoneNumberField(Field):
+class PhoneNumberField(CharField):
 
     description = _("Phone number")
 
-    def get_internal_type(self):
-        return "PhoneNumberField"
-
-    def db_type(self, connection):
-        if connection.settings_dict['ENGINE'] == 'django.db.backends.oracle':
-            return 'VARCHAR2(20)'
-        else:
-            return 'varchar(20)'
+    def __init__(self, *args, **kwargs):
+        kwargs['max_length'] = 20
+        super(PhoneNumberField, self).__init__(*args, **kwargs)
 
     def formfield(self, **kwargs):
         from django.contrib.localflavor.us.forms import USPhoneNumberField
         defaults = {'form_class': USPhoneNumberField}
         defaults.update(kwargs)
         return super(PhoneNumberField, self).formfield(**defaults)
-