diff --git a/docs/customizing.rst b/docs/customizing.rst
index 3aff81c..8bc5601 100644
--- a/docs/customizing.rst
+++ b/docs/customizing.rst
@@ -62,12 +62,9 @@ The following is a list of all the available context processor decorators:
 Forms
 -----
 
-All forms can be overridden in much the same way as context
-processors. For each form used, you can specify a function that
-returns the form class. This allows you to override/extend forms. For
-example, to add extra fields to the register form::
-
-    security = Security(app, user_datastore)
+All forms can be overridden. For each form used, you can specify a
+replacement class. This allows you to add extra fields to the
+register form or override validators::
 
     from flask_security.forms import RegisterForm
 
@@ -75,11 +72,10 @@ example, to add extra fields to the register form::
         first_name = TextField('First Name', [Required()])
         last_name = TextField('Last Name', [Required()])
 
-    @security.register_form
-    def security_register_form():
-        return ExtendedRegisterForm
+    security = Security(app, user_datastore,
+             register_form=ExtendedRegisterForm)
 
-The following is a list of all the available form override decorators:
+The following is a list of all the available form overrides:
 
 * ``login_form``: Login form
 * ``confirm_register_form``: Confirmable register form