diff --git a/imapsync.nu b/imapsync.nu
index a398f1b..e9e189f 100755
--- a/imapsync.nu
+++ b/imapsync.nu
@@ -44,7 +44,7 @@ def "main synchronize" [conffile] {
       print $"    host1: ($u.host1), user1: ($u.user1),"
       print $"    host2: ($u.host2), user2: ($u.user2)\n"
 
-      imapsync --syncinternaldates --host1 $u.host1 --user1 $u.user1 --password1 $u.password1 --host2 $u.host2 --user2 $u.user2 --password2 $u.password2 | print
+      imapsync --syncinternaldates --addheader --host1 $u.host1 --user1 $u.user1 --password1 $u.password1 --host2 $u.host2 --user2 $u.user2 --password2 $u.password2 | print
     }
   )
   ""