diff --git a/ArduCopter/motors.pde b/ArduCopter/motors.pde
index ae4795995a..5c25376514 100644
--- a/ArduCopter/motors.pde
+++ b/ArduCopter/motors.pde
@@ -350,7 +350,7 @@ static void pre_arm_rc_checks()
     }
 
     // check if radio has been calibrated
-    if(!g.rc_3.radio_min.load()) {
+    if(!g.rc_3.radio_min.load() && !g.rc_3.radio_max.load()) {
         return;
     }