1 files changed, 9 insertions, 1 deletions
diff --git a/make.mk b/make.mk
index 2870c4f3..955ea310 100644
--- a/make.mk
+++ b/make.mk
@@ -208,7 +208,15 @@ ifeq ($(LED), BLUE)
 CFLAGS += -DWATCH_IS_BLUE_BOARD
 endif
 
-ifeq ($(LED), RED)
+ifndef COLOR
+$(error Set the COLOR variable to RED, BLUE, or GREEN depending on what board you have.)
+endif
+
+ifeq ($(COLOR), BLUE)
+CFLAGS += -DWATCH_IS_BLUE_BOARD
+endif
+
+ifeq ($(COLOR), RED)
 CFLAGS += -DWATCH_INVERT_LED_POLARITY
 CFLAGS += -DNO_FREQCORR
 endif