diff --git a/src/OAuth2/Grant/RefreshToken.php b/src/OAuth2/Grant/RefreshToken.php
index 46d9103a..ee941554 100644
--- a/src/OAuth2/Grant/RefreshToken.php
+++ b/src/OAuth2/Grant/RefreshToken.php
@@ -102,7 +102,7 @@ class RefreshToken implements GrantTypeInterface {
         }
 
         // Validate refresh token
-        $sessionId = $this->authServer->getStorage('client')->validateRefreshToken(
+        $sessionId = $this->authServer->getStorage('session')->validateRefreshToken(
             $authParams['refresh_token'],
             $authParams['client_id']
         );
@@ -129,4 +129,4 @@ class RefreshToken implements GrantTypeInterface {
         );
     }
 
-}
\ No newline at end of file
+}