diff --git a/hw/bsp/lpc40/family.mk b/hw/bsp/lpc40/family.mk
index 0fc7095f5..c11325890 100644
--- a/hw/bsp/lpc40/family.mk
+++ b/hw/bsp/lpc40/family.mk
@@ -31,6 +31,3 @@ SRC_C += \
 INC += \
 	$(TOP)/$(MCU_DIR)/inc \
 	$(TOP)/$(BOARD_PATH)
-
-# For freeRTOS port source
-FREERTOS_PORTABLE_SRC = $(FREERTOS_PORTABLE_PATH)/ARM_CM4F