diff --git a/ArduCopterMega/Parameters.h b/ArduCopterMega/Parameters.h
index 3b9e28e1fb..d71116d3a7 100644
--- a/ArduCopterMega/Parameters.h
+++ b/ArduCopterMega/Parameters.h
@@ -143,8 +143,8 @@ public:
 
     // Throttle
     //
-    AP_Int8     throttle_min;
-    AP_Int8     throttle_max;
+    AP_Int16    throttle_min;
+    AP_Int16    throttle_max;
     AP_Int8     throttle_failsafe_enabled;
     AP_Int8     throttle_failsafe_action;
     AP_Int16    throttle_failsafe_value;