1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index ec992ae..1c6b6ba 100644
--- a/Makefile
+++ b/Makefile
@@ -23,7 +23,7 @@ CXXFLAGS = -DARDUINO_AVR_MODEL01 \
            -DUSB_MANUFACTURER="\"keyboardio\"" -DUSB_PRODUCT="\"Model 01\"" \
            -DKALEIDOSCOPE_HARDWARE_H="\"Kaleidoscope-Hardware-Model01.h\""
 
-ifeq ($(ENABLE_SERIAL),1)
+ifeq ($(ENABLE_SERIAL),yes)
 CXXFLAGS += -DENABLE_SERIAL
 endif