diff --git a/xml/shibboleth-metadata-1.0.xsd b/xml/shibboleth-metadata-1.0.xsd
index c16d94df..be1441dd 100644
--- a/xml/shibboleth-metadata-1.0.xsd
+++ b/xml/shibboleth-metadata-1.0.xsd
@@ -1,10 +1,13 @@
 <?xml version="1.0" encoding="US-ASCII"?>
 <schema targetNamespace="urn:mace:shibboleth:metadata:1.0"
 	xmlns="http://www.w3.org/2001/XMLSchema"
+	xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
 	elementFormDefault="unqualified"
 	attributeFormDefault="unqualified"
 	version="1.0">
 
+	<import namespace="http://www.w3.org/2000/09/xmldsig#" schemaLocation="xmldsig-core-schema.xsd"/>
+
 	<element name="Scope">
 		<annotation>
 			<documentation>
@@ -21,13 +24,13 @@
 	</element>
 
 	<element name="KeyAuthority">
+		<annotation>
+			<documentation>
+			Binds keying authorities to the system entity/entities to which the enclosing
+			metadata element applies.
+			</documentation>
+		</annotation>
 		<complexType>
-			<annotation>
-				<documentation>
-				Binds keying authorities to the system entity/entities to which the enclosing
-				metadata element applies.
-				</documentation>
-			</annotation>
 			<sequence>
 				<element ref="ds:KeyInfo" maxOccurs="unbounded"/>
 			</sequence>