diff --git a/zephyr/Makefile b/zephyr/Makefile
index 8aa6d5ae49e8d3c647b55d0e2277fcb62ea9dd97..9ddf121250b198f0ae61d8474586be8f74849d8e 100644
--- a/zephyr/Makefile
+++ b/zephyr/Makefile
@@ -54,7 +54,7 @@ SRC_QSTR += $(SRC_C)
 OBJ = $(PY_O) $(addprefix $(BUILD)/, $(SRC_C:.c=.o))
 
 CFLAGS = $(KBUILD_CFLAGS) $(NOSTDINC_FLAGS) $(ZEPHYRINCLUDE) \
-	 -std=gnu99 -DNDEBUG -DMICROPY_HEAP_SIZE=$(MICROPY_HEAP_SIZE) $(CFLAGS_EXTRA) $(INC)
+	 -std=gnu99 -fomit-frame-pointer -DNDEBUG -DMICROPY_HEAP_SIZE=$(MICROPY_HEAP_SIZE) $(CFLAGS_EXTRA) $(INC)
 
 include ../py/mkrules.mk