diff --git a/ArduCopter/Log.pde b/ArduCopter/Log.pde
index 31a10b7a39..470afb835b 100644
--- a/ArduCopter/Log.pde
+++ b/ArduCopter/Log.pde
@@ -664,7 +664,7 @@ static void Log_Write_Baro(void)
 
 static const struct LogStructure log_structure[] PROGMEM = {
     LOG_COMMON_STRUCTURES,
-#if AUTOTUNE == ENABLED
+#if AUTOTUNE_ENABLED == ENABLED
     { LOG_AUTOTUNE_MSG, sizeof(log_AutoTune),
       "ATUN", "BBfffff",       "Axis,TuneStep,RateMin,RateMax,RPGain,RDGain,SPGain" },
     { LOG_AUTOTUNEDETAILS_MSG, sizeof(log_AutoTuneDetails),