diff --git a/libraries/AP_Motors/AP_MotorsHeli_RSC.h b/libraries/AP_Motors/AP_MotorsHeli_RSC.h
index 276728ca4d1dc..03b3500c9bc63 100644
--- a/libraries/AP_Motors/AP_MotorsHeli_RSC.h
+++ b/libraries/AP_Motors/AP_MotorsHeli_RSC.h
@@ -129,7 +129,7 @@ class AP_MotorsHeli_RSC {
     uint32_t    get_output_mask() const;
 
     // rotor_speed_above_critical - return true if rotor speed is above that critical for flight
-    bool        rotor_speed_above_critical(void) const { return get_rotor_speed() > get_critical_speed(); }
+    bool        rotor_speed_above_critical(void) const { return get_rotor_speed() >= get_critical_speed(); }
 
     // var_info for holding Parameter information
     static const struct AP_Param::GroupInfo var_info[];