diff --git a/Dynamic-filtering:-default-deny:-useful-rulesets.md b/Dynamic-filtering:-default-deny:-useful-rulesets.md
index 26f07d2..c158965 100644
--- a/Dynamic-filtering:-default-deny:-useful-rulesets.md
+++ b/Dynamic-filtering:-default-deny:-useful-rulesets.md
@@ -117,6 +117,7 @@ Reminder: the `noop` rule action means that network requests will not be filtere
 
     # mozilla.org
     mozilla.org mozilla.net * noop
+    mozilla.org mozillademos.org * noop
 
     # nbcnews.com
     www.nbcnews.com nbcudigitaladops.com * noop