diff --git a/src/drivers/boards/auav-x21/board_config.h b/src/drivers/boards/auav-x21/board_config.h
index 91f2d7f575..6bc392043f 100644
--- a/src/drivers/boards/auav-x21/board_config.h
+++ b/src/drivers/boards/auav-x21/board_config.h
@@ -211,9 +211,6 @@
 
 #define BOARD_NAME "AUAV_X21"
 
-// Run the FMU task on its own thread to reduce jitter
-#define PX4FMU_TASK
-
 /* By Providing BOARD_ADC_USB_CONNECTED this board support the ADC
  * system_power interface, and therefore provides the true logic
  * GPIO BOARD_ADC_xxxx macros.
diff --git a/src/drivers/boards/px4fmu-v4/board_config.h b/src/drivers/boards/px4fmu-v4/board_config.h
index 02b8df95ba..f86d904aea 100644
--- a/src/drivers/boards/px4fmu-v4/board_config.h
+++ b/src/drivers/boards/px4fmu-v4/board_config.h
@@ -275,9 +275,6 @@
 
 #define	BOARD_NAME "PX4FMU_V4"
 
-// Run the FMU task on its own thread to reduce jitter
-#define PX4FMU_TASK
-
 /* By Providing BOARD_ADC_USB_CONNECTED (using the px4_arch abstraction)
  * this board support the ADC system_power interface, and therefore
  * provides the true logic GPIO BOARD_ADC_xxxx macros.