diff --git a/functions/pdf.sgml b/functions/pdf.sgml
index f417b1e60f..298cfe110e 100644
--- a/functions/pdf.sgml
+++ b/functions/pdf.sgml
@@ -2061,7 +2061,7 @@ sgml-always-quote-attributes:t
 sgml-indent-step:1
 sgml-indent-data:t
 sgml-parent-document:nil
-sgml-default-dtd-file:"../manual.ced"
+sgml-default-dtd-file:"../../manual.ced"
 sgml-exposed-tags:nil
 sgml-local-catalogs:nil
 sgml-local-ecat-files:nil