diff --git a/Static-filter-syntax.md b/Static-filter-syntax.md
index 3b18d1d..cdd79a7 100644
--- a/Static-filter-syntax.md
+++ b/Static-filter-syntax.md
@@ -155,6 +155,10 @@ So in uBO, any pattern which can be wholly read as a valid hostname, will be ass
 
     example.com*
 
+If the filter is a filename, it is ideal to add `^` at one or both ends:
+
+    ^example.js^
+
 ***
 
 #### `*` aka "all URLs"