diff --git a/AUTHORS.rst b/AUTHORS.rst
index 599327bf..d0e44ca5 100644
--- a/AUTHORS.rst
+++ b/AUTHORS.rst
@@ -10,6 +10,7 @@ It’s the spiritual successor of `characteristic <https://characteristic.readth
 
 The following folks helped forming ``attrs`` into what it is now:
 
+- `David Cournapeau <https://github.com/cournape/>`_
 - `Glyph <https://github.com/glyph/>`_
 - `HawkOwl <https://github.com/hawkowl>`_
 - `Lynn Root <https://github.com/econchick>`_
diff --git a/attr/_make.py b/attr/_make.py
index a2532dc0..e4a9d066 100644
--- a/attr/_make.py
+++ b/attr/_make.py
@@ -390,7 +390,7 @@ def validate(inst):
     if _config._run_validators is False:
         return
 
-    for a in fields(inst.__class__):
+    for a in inst.__class__.__attrs_attrs__:
         if a.validator is not None:
             a.validator(inst, a, getattr(inst, a.name))
 
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 5b889532..fe4af322 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -16,7 +16,7 @@ The third digit is only for regressions.
 Changes:
 ^^^^^^^^
 
-None
+- speed up object creation when attribute validators are used `[28] <https://github.com/hynek/attrs/issues/28>`_
 
 
 15.1.0 (2015-08-20)