SRC += $(QUANTUM_DIR)/process_keycode/process_midi.c
endif
+ifeq ($(strip $(COMBO_ENABLE)), yes)
+ OPT_DEFS += -DCOMBO_ENABLE
+ SRC += $(QUANTUM_DIR)/process_keycode/process_combo.c
+endif
+
ifeq ($(strip $(VIRTSER_ENABLE)), yes)
OPT_DEFS += -DVIRTSER_ENABLE
endif