diff --git a/APMrover2/Rover.h b/APMrover2/Rover.h
index 84af5cb6ff..241e9f0994 100644
--- a/APMrover2/Rover.h
+++ b/APMrover2/Rover.h
@@ -513,7 +513,7 @@ private:
     void init_rc_out();
     void rudder_arm_disarm_check();
     void read_radio();
-    void control_failsafe(uint16_t pwm);
+    void radio_failsafe_check(uint16_t pwm);
     bool trim_radio();
 
     // sailboat.cpp
diff --git a/APMrover2/radio.cpp b/APMrover2/radio.cpp
index 1f8c92cc74..dda0b0a8c2 100644
--- a/APMrover2/radio.cpp
+++ b/APMrover2/radio.cpp
@@ -111,22 +111,22 @@ void Rover::read_radio()
 {
     if (!rc().read_input()) {
         // check if we lost RC link
-        control_failsafe(channel_throttle->get_radio_in());
+        radio_failsafe_check(channel_throttle->get_radio_in());
         return;
     }
 
     failsafe.last_valid_rc_ms = AP_HAL::millis();
     // check that RC value are valid
-    control_failsafe(channel_throttle->get_radio_in());
+    radio_failsafe_check(channel_throttle->get_radio_in());
 
     // check if we try to do RC arm/disarm
     rudder_arm_disarm_check();
 }
 
-void Rover::control_failsafe(uint16_t pwm)
+void Rover::radio_failsafe_check(uint16_t pwm)
 {
     if (!g.fs_throttle_enabled) {
-        // no throttle failsafe
+        // radio failsafe disabled
         return;
     }