diff --git a/oauth3.issuer.js b/oauth3.issuer.js
index 6d1519f..d751f96 100644
--- a/oauth3.issuer.js
+++ b/oauth3.issuer.js
@@ -294,7 +294,7 @@ OAUTH3.urls.credentialMeta = function (directive, opts) {
       .replace(':id', opts.email)
 };
 
-OAUTH3.authn = {};
+OAUTH3.authn = OAUTH3.authn || {};
 OAUTH3.authn.loginMeta = function (directive, opts) {
   var url = OAUTH3.urls.credentialMeta(directive, opts);
   return OAUTH3.request({