diff --git a/install/install.php b/install/install.php
index 159ae15..36c178b 100755
--- a/install/install.php
+++ b/install/install.php
@@ -667,7 +667,7 @@ define(\'DEBUG\', FALSE);
 					if($_POST['pass']!=$_POST['passrepeat']){
 						$err.='<p><div class="comment"><img src="style/images/error.png" alt="" /><span style="color: red;">'.$this->t->_('Passwoerterfalsch').'</span></div></p>';
 					}
-					if(!preg_match("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $_POST['email'])){
+					if(empty(preg_grep("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $_POST['email']))){
 						$err.='<p><div class="comment"><img src="style/images/error.png" alt="" /><span style="color: red;">'.$this->t->_('Emailinkorrekt').'</span></div></p>';
 					}
 					if(!$err){