diff --git a/comments.php b/comments.php
index b46ee3f8e..de328152f 100644
--- a/comments.php
+++ b/comments.php
@@ -117,7 +117,7 @@ if (isset($_GET['keyword']) and !empty($_GET['keyword']))
                 '$s',
                 'return "content LIKE \'%$s%\'";'
                 ),
-              preg_split('/[\s,;]+/', $keyword)
+              preg_split('/[\s,;]+/', $_GET['keyword'] )
               )
       ).
     ')';