diff --git a/flight/UAVTalk/inc/uavtalk_priv.h b/flight/UAVTalk/inc/uavtalk_priv.h
index 1bcf01fd9..06f08b997 100644
--- a/flight/UAVTalk/inc/uavtalk_priv.h
+++ b/flight/UAVTalk/inc/uavtalk_priv.h
@@ -51,7 +51,7 @@ typedef struct {
 
 typedef uint8_t uavtalk_checksum;
 #define UAVTALK_CHECKSUM_LENGTH	        sizeof(uavtalk_checksum)
-#define UAVTALK_MAX_PAYLOAD_LENGTH      UAVOBJECTS_LARGEST
+#define UAVTALK_MAX_PAYLOAD_LENGTH      (UAVOBJECTS_LARGEST + 1)
 #define UAVTALK_MIN_PACKET_LENGTH	UAVTALK_MAX_HEADER_LENGTH + UAVTALK_CHECKSUM_LENGTH
 #define UAVTALK_MAX_PACKET_LENGTH       UAVTALK_MIN_PACKET_LENGTH + UAVTALK_MAX_PAYLOAD_LENGTH