diff --git a/openrtx/include/rtx/rtx.h b/openrtx/include/rtx/rtx.h
index 0447073a..69371be4 100644
--- a/openrtx/include/rtx/rtx.h
+++ b/openrtx/include/rtx/rtx.h
@@ -51,6 +51,12 @@ typedef struct
 
     uint16_t txToneEn : 1,  /**< TX CTC/DCS tone enable        */
              txTone   : 15; /**< TX CTC/DCS tone               */
+
+    uint8_t  rxCan : 4,     /**< M17 Channel Access Number for RX squelch */
+             txCan : 4;     /**< M17 Channel Access Number for TX squelch */
+
+    char     source_address[10];      /**< M17 call source address */
+    char     destination_address[10]; /**< M17 call routing address */
 }
 rtxStatus_t;