diff --git a/Dynamic-filtering:-default-deny:-useful-rulesets.md b/Dynamic-filtering:-default-deny:-useful-rulesets.md
index 73a6525..afeb2cd 100644
--- a/Dynamic-filtering:-default-deny:-useful-rulesets.md
+++ b/Dynamic-filtering:-default-deny:-useful-rulesets.md
@@ -25,6 +25,7 @@ Reminder: the `noop` rule action means that network requests will not be filtere
 
     # facebook.com
     facebook.com akamaihd.net * noop
+    facebook.com fbcdn.net * noop
 
     # foxnews.com
     foxnews.com fncstatic.com * noop