diff --git a/xep-0071.xml b/xep-0071.xml
index 5e801f53..cef81a3f 100644
--- a/xep-0071.xml
+++ b/xep-0071.xml
@@ -915,7 +915,8 @@ That seems fine to me.
     xmlns='http://jabber.org/protocol/xhtml-im'
     elementFormDefault='qualified'>
 
-  <xs:import namespace='http://www.w3.org/1999/xhtml'/>
+  <xs:import namespace='http://www.w3.org/1999/xhtml'
+             schemaLocation='http://www.w3.org/2002/08/xhtml/xhtml1-strict.xsd'/>
 
   <xs:annotation>
     <xs:documentation>