diff --git a/ArduCopterMega/Parameters.h b/ArduCopterMega/Parameters.h
index 446ff9f653..a6399771fe 100644
--- a/ArduCopterMega/Parameters.h
+++ b/ArduCopterMega/Parameters.h
@@ -17,7 +17,7 @@ public:
     // The increment will prevent old parameters from being used incorrectly
     // by newer code.
     //
-    static const uint16_t k_format_version = 8;
+    static const uint16_t k_format_version = 9;
 
     //
     // Parameter identities.