diff --git a/docs/ref/models/expressions.txt b/docs/ref/models/expressions.txt
index 6148f65363..77e8b165da 100644
--- a/docs/ref/models/expressions.txt
+++ b/docs/ref/models/expressions.txt
@@ -1220,7 +1220,6 @@ values. It will return the first column or value that isn't ``NULL``.
 We'll start by defining the template to be used for SQL generation and
 an ``__init__()`` method to set some attributes::
 
-  import copy
   from django.db.models import Expression