diff --git a/ArduCopter/ArduCopter.pde b/ArduCopter/ArduCopter.pde
index 6f511ad33e..0b356b4844 100644
--- a/ArduCopter/ArduCopter.pde
+++ b/ArduCopter/ArduCopter.pde
@@ -1,6 +1,6 @@
 /// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
 
-#define THISFIRMWARE "ArduCopter V2.9-rc1"
+#define THISFIRMWARE "ArduCopter V2.9-rc2"
 /*
  *  ArduCopter Version 2.9
  *  Lead author:	Jason Short
diff --git a/ArduCopter/ReleaseNotes.txt b/ArduCopter/ReleaseNotes.txt
index ef31392ee3..4f60be50e6 100644
--- a/ArduCopter/ReleaseNotes.txt
+++ b/ArduCopter/ReleaseNotes.txt
@@ -1,5 +1,10 @@
 ArduCopter Release Notes:
 
+------------------------------------------------------------------
+ArduCopter 2.9-rc2 31-Dec-2012
+Improvements over 2.9-rc2:
+1) increased throttle rate gains from 1.0 to 6.0
+2) APM1 fix so it works with inertial nav (5hz update rate of baro was beyond the tolerance set in the inav library)
 ------------------------------------------------------------------
 ArduCopter 2.9-rc1 23-Dec-2012
 Improvements over 2.8.1: