diff --git a/docs/topics/serialization.txt b/docs/topics/serialization.txt
index b33e4effe3..62b8869313 100644
--- a/docs/topics/serialization.txt
+++ b/docs/topics/serialization.txt
@@ -264,7 +264,7 @@ name::
 
     class PersonManager(models.Manager):
         def get_by_natural_key(self, first_name, last_name):
-            return self.filter(first_name=first_name, last_name=last_name)
+            return self.get(first_name=first_name, last_name=last_name)
 
     class Person(models.Model):
         objects = PersonManager()