Merge pull request #4718 from jfw/patch-4

typo

docs/api-guide/permissions.md

@@ -164,7 +164,7 @@ As with `DjangoModelPermissions`, this permission must only be applied to views
 
 Note that `DjangoObjectPermissions` **does not** require the `django-guardian` package, and should support other object-level backends equally well.
 
-As with `DjangoModelPermissions` you can use custom model permissions by overriding `DjangoModelPermissions` and setting the `.perms_map` property.  Refer to the source code for details.
+As with `DjangoModelPermissions` you can use custom model permissions by overriding `DjangoObjectPermissions` and setting the `.perms_map` property.  Refer to the source code for details.
 
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