diff --git a/comment_subject.module b/comment_subject.module
index 3cfbcdd..8e11745 100644
--- a/comment_subject.module
+++ b/comment_subject.module
@@ -140,7 +140,7 @@ function comment_subject_form_comment_form_alter(&$form, &$form_state) {
       // fall through (the subject is disable, but there are no unsupported tokens for preview)
     }
     // keep this consistent with internal properties added in comment_form
-    foreach (array('cid', 'pid', 'nid', 'language', 'uid') as $key) {
+    foreach (array('cid', 'pid', 'nid', 'language', 'uid', 'node_type') as $key) {
       $comment[$key] = $form[$key]['#value'];
     }
     $comment = (object)$comment;