diff --git a/docs/howto/custom-lookups.txt b/docs/howto/custom-lookups.txt
index 5c5621e28c..6b9545a568 100644
--- a/docs/howto/custom-lookups.txt
+++ b/docs/howto/custom-lookups.txt
@@ -50,7 +50,7 @@ Lookup registration can also be done using a decorator pattern::
 
     from django.db.models.fields import Field
 
-    @Field.registerLookup
+    @Field.register_lookup
     class NotEqualLookup(Lookup):
         # ...