diff --git a/sgml/freebsd.dsl b/sgml/freebsd.dsl
index 54d30159e6..37fe2d1003 100644
--- a/sgml/freebsd.dsl
+++ b/sgml/freebsd.dsl
@@ -41,6 +41,10 @@
           ;; Name for the root HTML document
           "index")
 
+        (define html-manifest
+          ;; Write a manifest?
+          #t)
+
         <!-- This replaces the existing mechanism for showing verbatim
              blocks of text (programlistings, screens, and so forth.