diff --git a/src/Provider/Azure.php b/src/Provider/Azure.php
index 86ac895..2cd8fa8 100644
--- a/src/Provider/Azure.php
+++ b/src/Provider/Azure.php
@@ -87,7 +87,7 @@ protected function checkResponse(ResponseInterface $response, $data)
     {
         if (isset($data['error'])) {
             throw new IdentityProviderException(
-                (isset($data['error']['message']) ? $data['error']['message'] : $response->getReasonPhrase()),
+                (isset($data['error_description']) ? $data['error_description'] : $response->getReasonPhrase()),
                 $response->getStatusCode(),
                 (string)$response->getBody()
             );