diff --git a/boxflat/moza_command.py b/boxflat/moza_command.py
index 4edaf91..1855037 100644
--- a/boxflat/moza_command.py
+++ b/boxflat/moza_command.py
@@ -220,5 +220,7 @@ def prepare_message(self, start_value: int,
         ret.extend(self.id_bytes)
         ret.extend(self._payload)
         ret.append(self.checksum(ret, magic_value))
+        if ret[-1] == 0x7e:
+            ret.append(0x7e)
 
         return bytes(ret)