diff --git a/ArduCopter/config.h b/ArduCopter/config.h
index 80f33b3a4b..706260667b 100644
--- a/ArduCopter/config.h
+++ b/ArduCopter/config.h
@@ -148,9 +148,6 @@
 #ifndef CONFIG_IMU_TYPE
  # define CONFIG_IMU_TYPE CONFIG_IMU_OILPAN
 #endif
-#ifndef MPU6K_FILTER
- # define MPU6K_FILTER MPU6K_DEFAULT_FILTER
-#endif
 
 //////////////////////////////////////////////////////////////////////////////
 // ADC Enable - used to eliminate for systems which don't have ADC.