diff --git a/src/helpers/BaseSerialInterface.h b/src/helpers/BaseSerialInterface.h
index e60927654..e9a3f2ab4 100644
--- a/src/helpers/BaseSerialInterface.h
+++ b/src/helpers/BaseSerialInterface.h
@@ -2,7 +2,7 @@
 
 #include <Arduino.h>
 
-#define MAX_FRAME_SIZE  172
+#define MAX_FRAME_SIZE  176   // +4 for transport codes (region scoping)
 
 class BaseSerialInterface {
 protected: