diff --git a/anmelden.php b/anmelden.php
index 3f0a8215..85bd84b7 100644
--- a/anmelden.php
+++ b/anmelden.php
@@ -11,6 +11,7 @@
 #################################################################################
 
 include('GameEngine/Account.php');
+$invited=(isset($_GET['uid'])) ? filter_var($_GET['uid'], FILTER_SANITIZE_NUMBER_INT):$form->getError('invt');
 ?>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 <html>
@@ -48,7 +49,7 @@ if(REG_OPEN == true){ ?>
 <p><?php echo BEFORE_REGISTER; ?></p>
 
 <form name="snd" method="post" action="anmelden.php">
-<input type="hidden" name="invited" value="<?php echo filter_var($_GET['id'], FILTER_SANITIZE_NUMBER_INT); ?>" />
+<input type="hidden" name="invited" value="<?php echo $invited; ?>" />
 <input type="hidden" name="ft" value="a1" />
 
 <table cellpadding="1" cellspacing="1" id="sign_input">
@@ -144,4 +145,4 @@ if(NEWSBOX3) { include("Templates/News/newsbox3.tpl"); }
 <?php include("Templates/footer.tpl"); ?>
 <div id="ce"></div>
 </body>
-</html>
\ No newline at end of file
+</html>
