diff --git a/lib/nntp/tiny/session.py b/lib/nntp/tiny/session.py
index f424b0e..7695ee9 100644
--- a/lib/nntp/tiny/session.py
+++ b/lib/nntp/tiny/session.py
@@ -568,7 +568,7 @@ class Session():
                 yield message
 
             if first:
-                self.respond(ResponseCode.NNTP_ARTICLE_NOT_FOUND_RANGE)
+                self.respond(ResponseCode.NNTP_ARTICLE_NOT_FOUND_NUM)
 
         self.end()