diff --git a/openid_provider.inc b/openid_provider.inc
index 01315b8..2f6040f 100644
--- a/openid_provider.inc
+++ b/openid_provider.inc
@@ -529,7 +529,7 @@ function _openid_provider_nonce() {
 function _openid_provider_sign($response) {
   module_load_include('inc', 'openid');
 
-  $signed_keys = array('op_endpoint', 'return_to', 'response_nonce', 'assoc_handle', 'identity', 'claimed_id', 'sreg.nickname', 'sreg.email');
+  $signed_keys = array('op_endpoint', 'return_to', 'response_nonce', 'assoc_handle', 'identity', 'claimed_id', 'sreg.nickname', 'sreg.email', 'ns.sreg');
   $signed_keys = array_merge($signed_keys, module_invoke_all('openid_provider', 'signed', $response));
   $response['openid.signed'] = implode(',', $signed_keys);