diff --git a/oauth3.core.js b/oauth3.core.js
index ac2c825..222553a 100644
--- a/oauth3.core.js
+++ b/oauth3.core.js
@@ -217,7 +217,7 @@
         return OAUTH3.discover(decoded.payload.iss).then(function (directives) {
           var urlObj = OAUTH3.urls.jwk(directives, decoded);
           return OAUTH3.request(urlObj).catch(function (err) {
-            return PromiseA.reject({
+            return OAUTH3.PromiseA.reject({
               message: 'failed to retrieve public key from token issuer'
             , code: 'E_NO_PUB_KEY'
             , url: 'https://oauth3.org/docs/errors#E_NO_PUB_KEY'
@@ -225,7 +225,7 @@
             });
           });
         }, function (err) {
-          return PromiseA.reject({
+          return OAUTH3.PromiseA.reject({
             message: 'token issuer is not a valid OAuth3 provider'
           , code: 'E_INVALID_ISS'
           , url: 'https://oauth3.org/docs/errors#E_INVALID_ISS'
@@ -233,7 +233,7 @@
           });
         }).then(function (res) {
           if (res.data.error) {
-            return PromiseA.reject(res.data.error);
+            return OAUTH3.PromiseA.reject(res.data.error);
           }
           return res.data;
         });
@@ -242,7 +242,7 @@
         var decoded;
 
         if (!token) {
-          return PromiseA.reject({
+          return OAUTH3.PromiseA.reject({
             message: 'no token provided'
           , code: 'E_NO_TOKEN'
           , url: 'https://oauth3.org/docs/errors#E_NO_TOKEN'
@@ -253,7 +253,7 @@
           decoded = OAUTH3.jwt.decode(token, {complete: true});
         } catch (e) {}
         if (!decoded) {
-          return PromiseA.reject({
+          return OAUTH3.PromiseA.reject({
             message: 'provided token not a JSON Web Token'
           , code: 'E_NOT_JWT'
           , url: 'https://oauth3.org/docs/errors#E_NOT_JWT'
@@ -271,7 +271,7 @@
           try {
             return OAUTH3.jwt.verify(token, jwk, opts);
           } catch (err) {
-            return PromiseA.reject({
+            return OAUTH3.PromiseA.reject({
               message: 'token verification failed'
             , code: 'E_INVALID_TOKEN'
             , url: 'https://oauth3.org/docs/errors#E_INVALID_TOKEN'