diff --git a/inc/config.php b/inc/config.php
index 6d1a8081..b17f55de 100644
--- a/inc/config.php
+++ b/inc/config.php
@@ -1103,6 +1103,7 @@
 	$config['error']['toomanycross']	= _('Too many cross-board links; post discarded.');
 	$config['error']['nodelete']		= _('You didn\'t select anything to delete.');
 	$config['error']['noreport']		= _('You didn\'t select anything to report.');
+	$config['error']['invalidreport']	= _('The reason was too long.');
 	$config['error']['toomanyreports']	= _('You can\'t report that many posts at once.');
 	$config['error']['invalidpassword']	= _('Wrong password…');
 	$config['error']['invalidimg']		= _('Invalid image.');
diff --git a/post.php b/post.php
index 47c5f0ef..01b2ef6e 100644
--- a/post.php
+++ b/post.php
@@ -287,6 +287,9 @@ if (isset($_POST['delete'])) {
 	
 	if (empty($report))
 		error($config['error']['noreport']);
+
+	if (strlen($report) > 30)
+		error($config['error']['invalidreport']);
 	
 	if (count($report) > $config['report_limit'])
 		error($config['error']['toomanyreports']);