diff --git a/pull_requests.py b/pull_requests.py
index 63454d0..ce389d4 100644
--- a/pull_requests.py
+++ b/pull_requests.py
@@ -55,11 +55,13 @@ def is_pull_good(pull: PullRequest, verbose: bool = False) -> bool:
 
     if comments.totalCount == 2:
         comment_1, comment_2 = sorted(comments, key=lambda c: c.created_at)
+        if comment_2.user is not None:
+            return False   # we can't if the second is from the author, so we discard the PR
 
-        is_reply = comment_2.in_reply_to_id == comment_1.id
-        is_from_author = comment_2.user.id == pull.user.id
-
-        if not (is_reply and is_from_author):
+        if comment_1.user is not None and not (
+            comment_2.in_reply_to_id == comment_1.id  # is reply
+            and comment_2.user.id == pull.user.id  # from the author of the PR
+        ):
             return False
 
     return has_only_1_comment(pull.get_commits(), pull.get_review_comments(), verbose=verbose)