diff --git a/Multiprotocol/Multiprotocol.h b/Multiprotocol/Multiprotocol.h
index baee1f4..5e4b13c 100644
--- a/Multiprotocol/Multiprotocol.h
+++ b/Multiprotocol/Multiprotocol.h
@@ -299,12 +299,12 @@ enum TRAXXAS
 
 struct PPM_Parameters
 {
-	uint8_t protocol;
-	uint8_t sub_proto :	3;
-	uint8_t rx_num :	4;
-	uint8_t power :		1;
-	uint8_t autobind :	1;
-	uint8_t option;
+	uint8_t protocol : 6;
+	uint8_t sub_proto : 3;
+	uint8_t rx_num : 4;
+	uint8_t power : 1;
+	uint8_t autobind : 1;
+	int8_t option;
 	uint32_t chan_order;
 };
 
diff --git a/Multiprotocol/Multiprotocol.ino b/Multiprotocol/Multiprotocol.ino
index c860f82..1347e94 100644
--- a/Multiprotocol/Multiprotocol.ino
+++ b/Multiprotocol/Multiprotocol.ino
@@ -503,7 +503,7 @@ void setup()
 				option			=	FORCE_HITEC_TUNING;		// Use config-defined tuning value for HITEC
 			else
 		#endif
-				option			=	PPM_prot_line->option;	// Use radio-defined option value
+				option			=	(uint8_t)PPM_prot_line->option;	// Use radio-defined option value
 
 		if(PPM_prot_line->power)		POWER_FLAG_on;
 		if(PPM_prot_line->autobind)