diff --git a/docs/ref/contrib/sites.txt b/docs/ref/contrib/sites.txt
index b3dd2933a73..3270850f118 100644
--- a/docs/ref/contrib/sites.txt
+++ b/docs/ref/contrib/sites.txt
@@ -21,7 +21,8 @@ The sites framework is mainly based on a simple model:
 
     .. attribute:: domain
 
-        The domain name associated with the Web site.
+        The fully qualified domain name associated with the Web site.
+        For example, ``www.example.com``.
 
     .. attribute:: name