diff --git a/docs/ref/templates/builtins.txt b/docs/ref/templates/builtins.txt
index 76db1f7659..3b650f1f69 100644
--- a/docs/ref/templates/builtins.txt
+++ b/docs/ref/templates/builtins.txt
@@ -2151,6 +2151,8 @@ urlize
 
 Converts URLs in text into clickable links.
 
+Only works for .com, .net, and .org top level domains.
+
 Works on links beginning with ``http://``, ``https://``, or ``www.`` and
 ending with ``.org``, ``.net`` or ``.com``. Links can have trailing punctuation
 (periods, commas, close-parens) and leading punctuation (opening parens) and