diff --git a/4.2.3-uMatrix.md b/4.2.3-uMatrix.md
index e155789..0a7b146 100644
--- a/4.2.3-uMatrix.md
+++ b/4.2.3-uMatrix.md
@@ -1,6 +1,6 @@
 :large_orange_diamond: **Block TLDs**
 
-Example: blocking [.cm](https://en.wikipedia.org/wiki/.cm) which is the [ccTLD](https://en.wikipedia.org/wiki/Country_code_top-level_domain) for Cameroon. Note: you will need both lines if you allow 1st-party, as the way uMatrix works, narrow rules win over broader rules.
+Example: blocking [.cm](https://en.wikipedia.org/wiki/.cm) which is the [ccTLD](https://en.wikipedia.org/wiki/Country_code_top-level_domain) for Cameroon. Note: you will need both lines if you allow 1st-party (`* 1st-party * allow`), as the way uMatrix works, narrow rules win over broader rules.
 
 ```
 * cm * block