diff --git a/ReCaptcha.php b/ReCaptcha.php
index 341dd70a..80134247 100644
--- a/ReCaptcha.php
+++ b/ReCaptcha.php
@@ -21,7 +21,7 @@ $dir = dirname( __FILE__ );
 
 $wgExtensionMessagesFiles['ReCaptcha'] = $dir . '/ReCaptcha.i18n.php';
 
-$wgAutoloadClasses['ReCaptcha']= $dir . '/Captcha.php';
+$wgAutoloadClasses['ReCaptcha']= $dir . '/ReCaptcha.class.php';
 
 require_once( 'recaptchalib.php' );