diff --git a/ext/comment/main.php b/ext/comment/main.php
index b86abc40..4f100a3f 100644
--- a/ext/comment/main.php
+++ b/ext/comment/main.php
@@ -310,6 +310,9 @@ class CommentList extends Extension {
 		if(!$config->get_bool('comment_anon') && $user->is_anonymous()) {
 			$event->veto("Anonymous posting has been disabled");
 		}
+		else if(is_null($database->get_image($image_id))) {
+			$event->veto("The image does not exist");
+		}
 		else if(trim($comment) == "") {
 			$event->veto("Comments need text...");
 		}