diff --git a/django/conf/__init__.py b/django/conf/__init__.py
index f2012a6400..a3e2f03234 100644
--- a/django/conf/__init__.py
+++ b/django/conf/__init__.py
@@ -69,7 +69,7 @@ class BaseSettings(object):
     def __setattr__(self, name, value):
         if name in ("MEDIA_URL", "STATIC_URL") and value and not value.endswith('/'):
             warnings.warn('If set, %s must end with a slash' % name,
-                          PendingDeprecationWarning)
+                          DeprecationWarning)
         object.__setattr__(self, name, value)