--- cyrus-imapd-2.4.20/imap/lmtp_sieve.c.orig	2019-12-16 06:49:12.000000000 +0100
+++ cyrus-imapd-2.4.20/imap/lmtp_sieve.c	2019-12-16 06:50:06.000000000 +0100
@@ -1048,7 +1048,7 @@
     if (createsievefolder) {
         /* Folder is already in internal namespace format */
         r = mboxlist_createmailbox(subfolder, 0, NULL,
-                                           1, userid, auth_state, 0, 0, 0);
+                                           0, userid, auth_state, 0, 0, 0);
         if (!r) {
             mboxlist_changesub(subfolder, userid, auth_state, 1, 1);
             syslog(LOG_DEBUG, "autosievefolder: User %s, folder %s creation succeeded",