diff --git a/django/db/models/sql/subqueries.py b/django/db/models/sql/subqueries.py
index 0a083a6938..1f9a13ecdc 100644
--- a/django/db/models/sql/subqueries.py
+++ b/django/db/models/sql/subqueries.py
@@ -95,7 +95,7 @@ class UpdateQuery(Query):
 
     def _setup_query(self):
         """
-        Runs on initialisation and after cloning. Any attributes that would
+        Runs on initialization and after cloning. Any attributes that would
         normally be set in __init__ should go in here, instead, so that they
         are also set up after a clone() call.
         """