diff --git a/PHPGangsta/GoogleAuthenticator.php b/PHPGangsta/GoogleAuthenticator.php
index 02c645f..ae23da0 100644
--- a/PHPGangsta/GoogleAuthenticator.php
+++ b/PHPGangsta/GoogleAuthenticator.php
@@ -128,7 +128,7 @@ public function verifyCode($secret, $code, $discrepancy = 1, $currentTimeSlice =
             $currentTimeSlice = floor(time() / 30);
         }
 
-        if (strlen($code) != 6) {
+        if (strlen($code) != $this->_codeLength) {
             return false;
         }