diff --git a/make.mk b/make.mk
index 35af342..4f9e65d 100644
--- a/make.mk
+++ b/make.mk
@@ -207,6 +207,10 @@ ifeq ($(LED), BLUE)
 CFLAGS += -DWATCH_IS_BLUE_BOARD
 endif
 
+ifeq ($(LED), RED)
+CFLAGS += -DWATCH_INVERT_LED_POLARITY
+endif
+
 ifdef FIRMWARE
 CFLAGS += -DMOVEMENT_FIRMWARE_$(FIRMWARE)=1
 CFLAGS += -DMOVEMENT_FIRMWARE=MOVEMENT_FIRMWARE_$(FIRMWARE)