diff --git a/ports/nrf/Makefile b/ports/nrf/Makefile
index 18c7b93660..496727f77a 100644
--- a/ports/nrf/Makefile
+++ b/ports/nrf/Makefile
@@ -102,7 +102,6 @@ endif
 CFLAGS += $(CFLAGS_MCU_$(MCU_SERIES)) 
 CFLAGS += $(INC) -Wall -Werror -g -ansi -std=gnu99 -nostdlib $(COPT) $(NRF_DEFINES) $(CFLAGS_MOD)
 CFLAGS += -fno-strict-aliasing
-CFLAGS += -fstack-usage
 CFLAGS += -Iboards/$(BOARD)
 CFLAGS += -DNRF5_HAL_H='<$(MCU_VARIANT)_hal.h>'
 CFLAGS += $(CFLAGS_LTO)