diff --git a/library/ajax/post_mod_comment.php b/library/ajax/post_mod_comment.php
index 3cc5e0f5..4dcd0530 100644
--- a/library/ajax/post_mod_comment.php
+++ b/library/ajax/post_mod_comment.php
@@ -7,7 +7,7 @@ global $lang, $userdata;
 $post_id    = (int) $this->request['post_id'];
 $mc_type    = (int) $this->request['mc_type'];
 $mc_text    = (string) $this->request['mc_text'];
-if (!$mc_text = prepare_message($mc_text)) $this->ajax_die($lang['EMPTY_MESSAGE']);
+if ($mc_type != 0 && !$mc_text = prepare_message($mc_text)) $this->ajax_die($lang['EMPTY_MESSAGE']);
 
 $post = DB()->fetch_row("
 	SELECT
@@ -57,4 +57,4 @@ $this->response['mc_type']  = $mc_type;
 $this->response['post_id']  = $post_id;
 $this->response['mc_title'] = sprintf($lang['MC_COMMENT'][$mc_type]['title'], profile_url($userdata));
 $this->response['mc_text']  = bbcode2html($mc_text);
-$this->response['mc_class'] = $mc_class;
\ No newline at end of file
+$this->response['mc_class'] = $mc_class;