diff --git a/playbooks/roles/backups/restic/files/restic-batch b/playbooks/roles/backups/restic/files/restic-batch
index 14cb20d..8b511f2 100644
--- a/playbooks/roles/backups/restic/files/restic-batch
+++ b/playbooks/roles/backups/restic/files/restic-batch
@@ -112,6 +112,10 @@ if __name__ == "__main__":
             # Prepare the ZFS snapshot to backup with restic.
             # --------------------------------------------------------------------------------------
             try:
+                # Bind mounting will preserve the device ID of the snapshot mount. This device ID is
+                # different for every snapshot causing trouble for restic which keeps track of
+                # device IDs. See https://github.com/restic/restic/issues/3041. Cloning does not
+                # have the same issue as it is a fresh mount.
                 subprocess.run(
                     ["/usr/sbin/zfs",
                      "clone", "-o", f"mountpoint={backup_path}", snapshot, "rpool/restic"],