diff --git a/ArduPlane/Parameters.h b/ArduPlane/Parameters.h
index 3c5d3ecdc2..be81ee4e98 100644
--- a/ArduPlane/Parameters.h
+++ b/ArduPlane/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 = 12;
+    static const uint16_t k_format_version = 13;
 
 	// The parameter software_type is set up solely for ground station use
 	// and identifies the software type (eg ArduPilotMega versus ArduCopterMega)