diff --git a/libraries/AP_Motors/AP_MotorsHeli.cpp b/libraries/AP_Motors/AP_MotorsHeli.cpp
index 84ee29c225abcb..f071096ff1346f 100644
--- a/libraries/AP_Motors/AP_MotorsHeli.cpp
+++ b/libraries/AP_Motors/AP_MotorsHeli.cpp
@@ -559,6 +559,10 @@ bool AP_MotorsHeli::arming_checks(size_t buflen, char *buffer) const
         return false;
     }
 
+    if (!_main_rotor.autorotation.arming_checks(buflen, buffer)) {
+        return false;
+    }
+
     return true;
 }