diff --git a/ArduCopter/ArduCopter.pde b/ArduCopter/ArduCopter.pde
index a97e77e59d3019ee2e93df660762a61aee9a245c..471dc6d52adde11c62e265ad87e779110667cc99 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 V3.1.1"
+#define THISFIRMWARE "ArduCopter V3.1.2-rc1"
 /*
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
diff --git a/ArduCopter/ReleaseNotes.txt b/ArduCopter/ReleaseNotes.txt
index 814603356e37e364506cc88cdb794e9f1e586e1a..1538b1b2f0c332224743e8fe3ac483308e9bb668 100644
--- a/ArduCopter/ReleaseNotes.txt
+++ b/ArduCopter/ReleaseNotes.txt
@@ -1,5 +1,9 @@
 ArduCopter Release Notes:
 ------------------------------------------------------------------
+ArduCopter 3.1.2-rc1 30-Jan-2014
+Changes from 3.1.1
+1) Pixhawk baro bug fix to SPI communication which could cause large altitude estimate jumps at high temperatures
+------------------------------------------------------------------
 ArduCopter 3.1.1 26-Jan-2014 / ArduCopter 3.1.1-rc2 21-Jan-2014
 Changes from 3.1.1-rc1
 1) Pixhawk improvements (available for APM2 when AC3.2 is released):