diff --git a/docs/topics/release-notes.md b/docs/topics/release-notes.md
index 0010f6878..2bc8b2d6a 100644
--- a/docs/topics/release-notes.md
+++ b/docs/topics/release-notes.md
@@ -112,11 +112,11 @@ You can determine your currently installed version using `pip freeze`:
 * Bugfix: `client.force_authenticate(None)` should also clear session info if it exists.
 * Bugfix: Client sending empty string instead of file now clears `FileField`.
 * Bugfix: Empty values on ChoiceFields with `required=False` now consistently return `None`.
-* Bugfix: Clients setting `page=0` now simply returns the default page size, instead of disabling pagination. [*]
+* Bugfix: Clients setting `page_size=0` now simply returns the default page size, instead of disabling pagination. [*]
 
 ---
 
-[*] Note that the change in `page=0` behaviour fixes what is considered to be a bug in how clients can effect the pagination size.  However if you were relying on this behavior you will need to add the following mixin to your list views in order to preserve the existing behavior.
+[*] Note that the change in `page_size=0` behaviour fixes what is considered to be a bug in how clients can effect the pagination size.  However if you were relying on this behavior you will need to add the following mixin to your list views in order to preserve the existing behavior.
 
     class DisablePaginationMixin(object):
         def get_paginate_by(self, queryset=None):
diff --git a/rest_framework/exceptions.py b/rest_framework/exceptions.py
index 0ac5866ef..5f774a9f3 100644
--- a/rest_framework/exceptions.py
+++ b/rest_framework/exceptions.py
@@ -20,6 +20,8 @@ class APIException(Exception):
     def __init__(self, detail=None):
         self.detail = detail or self.default_detail
 
+    def __str__(self):
+        return self.detail
 
 class ParseError(APIException):
     status_code = status.HTTP_400_BAD_REQUEST