diff --git a/libraries/APM_RC/APM_RC.cpp b/libraries/APM_RC/APM_RC.cpp
index deb36e87bf..7e3dda2cbd 100644
--- a/libraries/APM_RC/APM_RC.cpp
+++ b/libraries/APM_RC/APM_RC.cpp
@@ -195,12 +195,21 @@ void APM_RC_Class::Force_Out6_Out7(void)
 // allow HIL override of RC values
 // A value of -1 means no change
 // A value of 0 means no override, use the real RC values
-void APM_RC_Class::setHIL(int16_t v[NUM_CHANNELS])
+bool APM_RC_Class::setHIL(int16_t v[NUM_CHANNELS])
 {
+	uint8_t sum = 0;
 	for (unsigned char i=0; i<NUM_CHANNELS; i++) {
 		if (v[i] != -1) {
 			_HIL_override[i] = v[i];
 		}
+		if (_HIL_override[i] != 0) {
+			sum++;
+		}
+		if (sum == 0) {
+			return 0;
+		} else {
+			return 1;
+		}
 	}
 	radio_status = 1;
 }
diff --git a/libraries/APM_RC/APM_RC.h b/libraries/APM_RC/APM_RC.h
index 238d0b8a53..2e8c6894e0 100644
--- a/libraries/APM_RC/APM_RC.h
+++ b/libraries/APM_RC/APM_RC.h
@@ -19,7 +19,7 @@ class APM_RC_Class
 	void Force_Out0_Out1(void);
 	void Force_Out2_Out3(void);
 	void Force_Out6_Out7(void);
-	void setHIL(int16_t v[NUM_CHANNELS]);
+	bool setHIL(int16_t v[NUM_CHANNELS]);
 
   private:
 	int16_t _HIL_override[NUM_CHANNELS];