diff --git a/src/OAuth2/AuthServer.php b/src/OAuth2/AuthServer.php
index fcae8a1f..d357c0ff 100644
--- a/src/OAuth2/AuthServer.php
+++ b/src/OAuth2/AuthServer.php
@@ -306,6 +306,16 @@ class AuthServer
         return $this->defaultScope;
     }
 
+    /**
+     * Require the "state" paremter in checkAuthoriseParams()
+     * @param  boolean $require
+     * @return void
+     */
+    public function stateParamRequired()
+    {
+        return $this->requireStateParam;
+    }
+
     /**
      * Require the "state" paremter in checkAuthoriseParams()
      * @param  boolean $require
diff --git a/src/OAuth2/Grant/AuthCode.php b/src/OAuth2/Grant/AuthCode.php
index acae346a..3b2d400d 100644
--- a/src/OAuth2/Grant/AuthCode.php
+++ b/src/OAuth2/Grant/AuthCode.php
@@ -90,7 +90,7 @@ class AuthCode implements GrantTypeInterface {
             throw new Exception\ClientException(sprintf($this->authServer->getExceptionMessage('invalid_request'), 'redirect_uri'), 0);
         }
 
-        if ($this->authServer->scopeParamRequired() === true && is_null($authParams['state'])) {
+        if ($this->authServer->stateParamRequired() === true && is_null($authParams['state'])) {
             throw new Exception\ClientException(sprintf($this->authServer->getExceptionMessage('invalid_request'), 'state'), 0);
         }