diff --git a/language-snippets.ent b/language-snippets.ent
index 030094931b..77bde59b74 100644
--- a/language-snippets.ent
+++ b/language-snippets.ent
@@ -246,3 +246,6 @@ are case-sensitive'>
This function is only available with Zend Engine 2, this means PHP
>= 5.0.0.'>
+
+This function is only avaliable in
+Tidy 1.0. It became obsolete in Tidy 2.0 and thus has been removed.'>