diff --git a/oauth3.core.js b/oauth3.core.js
index f14d429..cb318eb 100644
--- a/oauth3.core.js
+++ b/oauth3.core.js
@@ -297,10 +297,13 @@
           debug: opts.debug || undefined
         , client_uri: opts.client_uri || opts.clientUri || undefined
         , client_id: opts.client_id || opts.client_uri || undefined
+        , subject: opts.subject
         , state: state
         };
         var result;
 
+        console.log('implicitGrant opts.subject: ', opts.subject);
+
         params.response_type = responseType;
         if (scope) {
           params.scope = OAUTH3.scope.stringify(scope);
@@ -712,6 +715,7 @@
         , client_id: opts.client_id || opts.client_uri
         , client_uri: opts.client_uri || opts.client_id
         , scope: opts.scope
+        , subject: opts.subject
         , state: opts._state || undefined
         , debug: opts.debug
         }
diff --git a/oauth3.issuer.js b/oauth3.issuer.js
index 257a196..19f3dc2 100644
--- a/oauth3.issuer.js
+++ b/oauth3.issuer.js
@@ -422,6 +422,7 @@ OAUTH3.authz.redirectWithToken = function (providerUri, session, clientParams, s
     , response_type: clientParams.response_type
     , referrer: clientParams.referrer
     , session: session
+    , subject: clientParams.subject
     , debug: clientParams.debug
     }).then(function (results) {