diff --git a/Multiprotocol/Multiprotocol.h b/Multiprotocol/Multiprotocol.h
index 09ddb57..cac7fb0 100644
--- a/Multiprotocol/Multiprotocol.h
+++ b/Multiprotocol/Multiprotocol.h
@@ -735,8 +735,8 @@ enum CYRF_POWER
 #define	CYRF_BIND_POWER		CYRF_POWER_0
 
 // SX1276
-#define JP_T18		0
-#define JP_TLite	1
+#define JP_T18		1
+#define JP_TLite	2
 
 enum TXRX_State {
 	TXRX_OFF,
diff --git a/Multiprotocol/Validate.h b/Multiprotocol/Validate.h
index 4928525..3da74e4 100644
--- a/Multiprotocol/Validate.h
+++ b/Multiprotocol/Validate.h
@@ -217,9 +217,12 @@
 	#if not defined(STM32_BOARD)
 		#error "Error MULTI_5IN1_INTERNAL is only for STM32 boards."
 	#endif
-	#if ! MULTI_5IN1_INTERNAL+0
+	#if ! (MULTI_5IN1_INTERNAL + 0)
 		#define MULTI_5IN1_INTERNAL JP_T18	// make JP_T18 default if it has not been explicitly declared
 	#endif
+	#if MULTI_5IN1_INTERNAL > JP_TLite
+		#error "Invalid value for MULTI_5IN1_INTERNAL."
+	#endif
 	#define A7105_INSTALLED
 	#define CYRF6936_INSTALLED
 	#define CC2500_INSTALLED