diff --git a/ArduCopter/APM_Config.h b/ArduCopter/APM_Config.h
index ed0cba1d09..beedb3c73a 100644
--- a/ArduCopter/APM_Config.h
+++ b/ArduCopter/APM_Config.h
@@ -66,6 +66,7 @@
 
 // enable this for the new 'APM2' hardware
 // #define CONFIG_APM_HARDWARE APM_HARDWARE_APM2
+// #define APM2_BETA_HARDWARE  // for developers who received an early beta board with the older BMP085
 
 #define LOITER_METHOD 0
 // set to 1 to try an alternative Loiter control method