1 files changed, 4 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index dfdfca9..de05a90 100644
--- a/Makefile
+++ b/Makefile
@@ -23,6 +23,10 @@ CXXFLAGS = -DARDUINO_AVR_MODEL01 \
            -DUSB_MANUFACTURER="\"keyboardio\"" -DUSB_PRODUCT="\"Model 01\"" \
            -DKALEIDOSCOPE_HARDWARE_H="\"Kaleidoscope-Hardware-Model01.h\""
 
+ifeq ($(ENABLE_SERIAL),1)
+CXXFLAGS += -DENABLE_SERIAL
+endif
+
 AVRDUDE_OPTS = -q
 AVRDUDE_CONF = /etc/avrdude.conf
 #MONITOR_PORT = $(firstword $(wildcard /dev/serial/by-id/usb-keyboardio_Model_01_*))