diff --git a/ArduPlane/APM_Config.h.reference b/ArduPlane/APM_Config.h.reference
index 3786839dc6..4c560ef062 100644
--- a/ArduPlane/APM_Config.h.reference
+++ b/ArduPlane/APM_Config.h.reference
@@ -398,9 +398,9 @@
 // also means that you should avoid switching out of MANUAL while you have
 // any control stick deflection.
 //
-// The default is to enable AUTO_TRIM.
+// The default is to disable AUTO_TRIM.
 //
-//#define AUTO_TRIM           ENABLED
+//#define AUTO_TRIM           DISABLED
 //
 
 //////////////////////////////////////////////////////////////////////////////
diff --git a/ArduPlane/config.h b/ArduPlane/config.h
index f5fac05daa..d48b4cb73d 100644
--- a/ArduPlane/config.h
+++ b/ArduPlane/config.h
@@ -300,7 +300,7 @@
 // AUTO_TRIM
 //
 #ifndef AUTO_TRIM
-# define AUTO_TRIM				ENABLED
+# define AUTO_TRIM				DISABLED
 #endif