diff --git a/slackpost.py b/slackpost.py
index ef7c637..f887e4e 100755
--- a/slackpost.py
+++ b/slackpost.py
@@ -61,7 +61,7 @@ print(text)
 
 thread = slack.find_thread(thread_id)
 if thread == None:
-    print("No such thread!")
+    print("No such thread: %s!" % thread_id)
     sys.exit(1)
 
-channel.post(text)
+thread.post(text)