diff --git a/libraries/AP_LTM_Telem/AP_LTM_Telem.cpp b/libraries/AP_LTM_Telem/AP_LTM_Telem.cpp
index 5d3bdc2f41..ebc44a3937 100644
--- a/libraries/AP_LTM_Telem/AP_LTM_Telem.cpp
+++ b/libraries/AP_LTM_Telem/AP_LTM_Telem.cpp
@@ -142,10 +142,12 @@ void AP_LTM_Telem::send_Sframe(void)
     const uint8_t flightmode = AP_Notify::flags.flight_mode; // flight mode
 
     uint8_t rssi = 0; // radio RSSI (%a)
+#if AP_RSSI_ENABLED
     AP_RSSI *ap_rssi = AP_RSSI::get_singleton();
     if (ap_rssi) {
         rssi = ap_rssi->read_receiver_rssi_uint8();
     }
+#endif
 
     const uint8_t armstat = AP_Notify::flags.armed;                                     // 0: disarmed, 1: armed
     const uint8_t failsafe = AP_Notify::flags.failsafe_radio;                           // 0: normal,   1: failsafe