diff --git a/signup_page.php b/signup_page.php
index 63cab3d206..c448dc48af 100644
--- a/signup_page.php
+++ b/signup_page.php
@@ -95,7 +95,7 @@
echo '
';
echo '
';
echo '
';
- print_captcha_input( 'captcha', '' );
+ print_captcha_input( 'captcha' );
echo '';
echo '