diff --git a/oauth3.core.js b/oauth3.core.js
index 9e90b33..e796a36 100644
--- a/oauth3.core.js
+++ b/oauth3.core.js
@@ -286,12 +286,13 @@
 
     var redirectUri = opts.redirectUri;
     var scope = opts.scope || directive.authn_scope;
-    var clientId = opts.appId || opts.clientId;
+    var clientId = opts.appId || opts.clientId || opts.clientUri;
     var args = directive[type];
     var uri = args.url;
     var state = core.utils.randomState();
     var params = {
       debug: opts.debug || undefined
+    , client_uri: opts.client_uri || opts.clientUri || undefined
     };
     var loc;
     var result;