diff --git a/main.c b/main.c
index 9b20069f..8daa7775 100644
--- a/main.c
+++ b/main.c
@@ -2348,7 +2348,7 @@ void get_tlm_fc() {  // FunCube Mode telemetry generation
 	source_bytes[0] = source_bytes[0] | ( 0x01 & (uint8_t)(sequence % 2));  // alternate last bit for RT1, RT2.
 
 	//	source_bytes[1] = 0x08 ; // extended Nayify - works per code
-	source_bytes[1] = 0x10 ; // extended JY-1 - works, no documentation
+	source_bytes[1] = 0xfb ; // funcube sim sat id per AMSAT-UK allocation
 	int extended = 1;
 #endif	
 #if defined(FC_SIM) || defined(JY_1)