diff --git a/libraries/AP_Frsky_Telem/AP_Frsky_D.cpp b/libraries/AP_Frsky_Telem/AP_Frsky_D.cpp
index ce25394074..1aeddb0f2e 100644
--- a/libraries/AP_Frsky_Telem/AP_Frsky_D.cpp
+++ b/libraries/AP_Frsky_Telem/AP_Frsky_D.cpp
@@ -49,7 +49,9 @@ void AP_Frsky_D::send(void)
         _D.last_200ms_frame = now;
         send_uint16(DATA_ID_TEMP2, (uint16_t)(AP::gps().num_sats() * 10 + AP::gps().status())); // send GPS status and number of satellites as num_sats*10 + status (to fit into a uint8_t)
         send_uint16(DATA_ID_TEMP1, gcs().custom_mode()); // send flight mode
-        send_uint16(DATA_ID_FUEL, (uint16_t)roundf(_battery.capacity_remaining_pct())); // send battery remaining
+        uint8_t percentage = 0;
+        IGNORE_RETURN(_battery.capacity_remaining_pct(percentage));
+        send_uint16(DATA_ID_FUEL, (uint16_t)roundf(percentage)); // send battery remaining
         send_uint16(DATA_ID_VFAS, (uint16_t)roundf(_battery.voltage() * 10.0f)); // send battery voltage
         float current;
         if (!_battery.current_amps(current)) {
diff --git a/libraries/AP_Frsky_Telem/AP_Frsky_SPort.cpp b/libraries/AP_Frsky_Telem/AP_Frsky_SPort.cpp
index 084db99645..215ba77938 100644
--- a/libraries/AP_Frsky_Telem/AP_Frsky_SPort.cpp
+++ b/libraries/AP_Frsky_Telem/AP_Frsky_SPort.cpp
@@ -66,8 +66,12 @@ void AP_Frsky_SPort::send(void)
             case SENSOR_ID_FAS: // Sensor ID  2
                 switch (_SPort.fas_call) {
                 case 0:
-                    send_sport_frame(SPORT_DATA_FRAME, FUEL_ID, (uint16_t)roundf(_battery.capacity_remaining_pct())); // send battery remaining as %
-                    break;
+                    {
+                        uint8_t percentage = 0;
+                        IGNORE_RETURN(_battery.capacity_remaining_pct(percentage));
+                        send_sport_frame(SPORT_DATA_FRAME, FUEL_ID, (uint16_t)roundf(percentage)); // send battery remaining
+                        break;
+                    }
                 case 1:
                     send_sport_frame(SPORT_DATA_FRAME, VFAS_ID, (uint16_t)roundf(_battery.voltage() * 100.0f)); // send battery voltage in cV
                     break;