diff --git a/ArduCopter/AP_Arming.cpp b/ArduCopter/AP_Arming.cpp
index 4fbfe125ccd30..dc30b2fefa1b4 100644
--- a/ArduCopter/AP_Arming.cpp
+++ b/ArduCopter/AP_Arming.cpp
@@ -238,11 +238,15 @@ bool AP_Arming_Copter::parameter_checks(bool display_failure)
         }
 
         #else
-        if (copter.g2.frame_class.get() == AP_Motors::MOTOR_FRAME_HELI_QUAD ||
-            copter.g2.frame_class.get() == AP_Motors::MOTOR_FRAME_HELI_DUAL ||
-            copter.g2.frame_class.get() == AP_Motors::MOTOR_FRAME_HELI) {
+        switch (copter.g2.frame_class.get()) {
+        case AP_Motors::MOTOR_FRAME_HELI_QUAD:
+        case AP_Motors::MOTOR_FRAME_HELI_DUAL:
+        case AP_Motors::MOTOR_FRAME_HELI:
             check_failed(ARMING_CHECK_PARAMETERS, display_failure, "Invalid MultiCopter FRAME_CLASS");
             return false;
+
+        default:
+            break;
         }
         #endif // HELI_FRAME