X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=lib%2Fthread.cc;h=4711319d2cf67618edfe7c74b78a0c940bbf9784;hp=62dbd3b345482ccb901b8c05c135238f35bc0264;hb=ac2146118b83ca08aa6dd1275f65eefaed9fe2c0;hpb=b9d4eb04126c3ac4e7287443de7eae7290cd5273

diff --git a/lib/thread.cc b/lib/thread.cc
index 62dbd3b3..4711319d 100644
--- a/lib/thread.cc
+++ b/lib/thread.cc
@@ -402,7 +402,7 @@ _parent_via_in_reply_to (notmuch_thread_t *thread, notmuch_message_t *message) {
     THREAD_DEBUG("checking message = %s in_reply_to=%s\n",
 		 notmuch_message_get_message_id (message), in_reply_to);
 
-    if (in_reply_to && strlen (in_reply_to) &&
+    if (in_reply_to && (! EMPTY_STRING(in_reply_to)) &&
 	g_hash_table_lookup_extended (thread->message_hash,
 				      in_reply_to, NULL,
 				      (void **) &parent)) {