diff --git a/ArduCopter/Log.pde b/ArduCopter/Log.pde
index 688fdfe1d2..713901d572 100644
--- a/ArduCopter/Log.pde
+++ b/ArduCopter/Log.pde
@@ -762,7 +762,6 @@ static void start_logging()
 
 static void Log_Write_Startup() {}
 static void Log_Write_Mode(uint8_t mode) {}
-static void Log_Write_IMU() {}
 #if AUTOTUNE_ENABLED == ENABLED
 static void Log_Write_AutoTune(uint8_t axis, uint8_t tune_step, float rate_min, float rate_max, float new_gain_rp, float new_gain_rd, float new_gain_sp) {}
 static void Log_Write_AutoTuneDetails(int16_t angle_cd, float rate_cds) {}