diff --git a/lib/SimpleSAML/Utilities.php b/lib/SimpleSAML/Utilities.php
index 17e4dce4a1b1844f06683dcae723082582bb66a4..5aeb8c5b13fc9f9de62a7a35a4ddc0e5cc65c689 100644
--- a/lib/SimpleSAML/Utilities.php
+++ b/lib/SimpleSAML/Utilities.php
@@ -765,6 +765,7 @@ class SimpleSAML_Utilities {
 				'@saml1p' => 'urn:oasis:names:tc:SAML:1.0:protocol',
 				'@saml2' => 'urn:oasis:names:tc:SAML:2.0:assertion',
 				'@saml2p' => 'urn:oasis:names:tc:SAML:2.0:protocol',
+				'@shibmd' => 'urn:mace:shibboleth:metadata:1.0',
 				);
 
 			/* Check if it is a valid shortcut. */