diff --git a/docs/schemas/capability.rng b/docs/schemas/capability.rng
index 8c928bcf0e..593d340e48 100644
--- a/docs/schemas/capability.rng
+++ b/docs/schemas/capability.rng
@@ -1,3 +1,4 @@
+<?xml version="1.0"?>
 <!-- A Relax NG schema for the libvirt capabilities XML format -->
 <grammar xmlns="http://relaxng.org/ns/structure/1.0"
     datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
diff --git a/docs/schemas/nodedev.rng b/docs/schemas/nodedev.rng
index 7c85815216..04d8ee9b1d 100644
--- a/docs/schemas/nodedev.rng
+++ b/docs/schemas/nodedev.rng
@@ -1,3 +1,4 @@
+<?xml version="1.0"?>
 <!-- A Relax NG schema for the libvirt node device XML format -->
 <grammar xmlns="http://relaxng.org/ns/structure/1.0"
     datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
diff --git a/docs/schemas/storageencryption.rng b/docs/schemas/storageencryption.rng
index bf17aadc57..fa9a8d5e4a 100644
--- a/docs/schemas/storageencryption.rng
+++ b/docs/schemas/storageencryption.rng
@@ -1,3 +1,4 @@
+<?xml version="1.0"?>
 <!-- A Relax NG schema for the libvirt volume encryption XML format -->
 <grammar xmlns="http://relaxng.org/ns/structure/1.0"
     datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">