diff --git a/django/forms/fields.py b/django/forms/fields.py
index 113a5aab22..6fe25a9043 100644
--- a/django/forms/fields.py
+++ b/django/forms/fields.py
@@ -583,6 +583,7 @@ class URLField(CharField):
         self.validators.append(validators.URLValidator(verify_exists=verify_exists, validator_user_agent=validator_user_agent))
 
     def to_python(self, value):
+        value = super(URLField, self).to_python(value)
         if value:
             url_fields = list(urlparse.urlsplit(value))
             if not url_fields[0]:
@@ -601,7 +602,7 @@ class URLField(CharField):
                 # the path portion may need to be added before query params
                 url_fields[2] = '/'
             value = urlparse.urlunsplit(url_fields)
-        return super(URLField, self).to_python(value)
+        return value
 
 class BooleanField(Field):
     widget = CheckboxInput
diff --git a/tests/regressiontests/forms/tests/fields.py b/tests/regressiontests/forms/tests/fields.py
index e1b7fe00c6..7cbe2eaccf 100644
--- a/tests/regressiontests/forms/tests/fields.py
+++ b/tests/regressiontests/forms/tests/fields.py
@@ -686,6 +686,10 @@ class FieldsTests(SimpleTestCase):
         url = u'http://t\xfcr.djangoproject.com/'
         self.assertEqual(url, f.clean(url))
 
+    def test_urlfield_not_string(self):
+        f = URLField(required=False)
+        self.assertRaisesMessage(ValidationError, "[u'Enter a valid URL.']", f.clean, 23)
+
     # BooleanField ################################################################
 
     def test_booleanfield_1(self):