diff --git a/inc/filters.php b/inc/filters.php
index f06154ba..f694d2b1 100644
--- a/inc/filters.php
+++ b/inc/filters.php
@@ -91,6 +91,8 @@ class Filter {
 				return preg_match($match, $post['subject']);
 			case 'body':
 				return preg_match($match, $post['body_nomarkup']);
+			case 'filehash':
+				return $match === $post['filehash'];
 			case 'filename':
 				if (!$post['has_file'])
 					return false;