diff --git a/Dynamic-filtering:-rule-syntax.md b/Dynamic-filtering:-rule-syntax.md
index 53a172f..df47c54 100644
--- a/Dynamic-filtering:-rule-syntax.md
+++ b/Dynamic-filtering:-rule-syntax.md
@@ -43,3 +43,4 @@ A matching rule can do one of three things:
     - `allow` dynamic filters rules override any existing static and dynamic block filters.
     - Thus they are most useful to create finer-grained exceptions, and to un-break web sites broken by some static filters somewhere.
 - `noop`: prevent matching net requests from being subjected to dynamic filtering.
+    - It cancels dynamic filtering, but it does not cancel static filtering.
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