X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=lib%2Fmessage.cc;h=49519f1e63e40830ac123373c6e24bf813afbcf1;hp=03b8c812eeef3238a7b5e7affde23f7b53bf85d6;hb=e5316b320a51915fc1dbdd8724643931cd03327f;hpb=12c91e8050eb0ae1ec68e1639560f8eba4654d9b

diff --git a/lib/message.cc b/lib/message.cc
index 03b8c812..49519f1e 100644
--- a/lib/message.cc
+++ b/lib/message.cc
@@ -318,7 +318,7 @@ _notmuch_message_get_in_reply_to (notmuch_message_t *message)
     in_reply_to = *i;
 
     if (i != message->doc.termlist_end () &&
-	strncmp ((*i).c_str (), prefix, prefix_len))
+	strncmp ((*i).c_str (), prefix, prefix_len) == 0)
     {
        INTERNAL_ERROR ("Message %s has duplicate In-Reply-To IDs: %s and %s\n",
 			notmuch_message_get_message_id (message),