diff --git a/docs/src/reference/docbook/sftp.xml b/docs/src/reference/docbook/sftp.xml
index 3e82fc9a18..1e8d8ea4b5 100644
--- a/docs/src/reference/docbook/sftp.xml
+++ b/docs/src/reference/docbook/sftp.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<chapter xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="Sftp"
+<chapter xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="sftp"
     xmlns:xlink="http://www.w3.org/1999/xlink">
   <title>SFTP Adapters</title>
   <para>