diff --git a/inc/config.php b/inc/config.php
index 6ede0332..a64f9ad8 100644
--- a/inc/config.php
+++ b/inc/config.php
@@ -314,7 +314,7 @@
 
     // Enable simple anti-spam measure.
     $config['simple_spam'] = array (
-            'question' => 'What is 2 + 2?',
+            'prompt' => 'What is 2 + 2?',
             'answer' => '4'
         );