1 files changed, 4 insertions, 0 deletions

diff --git a/build_keyboard.mk b/build_keyboard.mk
index a2a2871e6..f843572f6 100644
--- a/build_keyboard.mk
+++ b/build_keyboard.mk
@@ -138,6 +138,10 @@ ifeq ($(strip $(MIDI_ENABLE)), yes)
         SRC += $(QUANTUM_DIR)/process_keycode/process_midi.c
 endif
 
+ifeq ($(strip $(VIRTSER_ENABLE)), yes)
+    OPT_DEFS += -DVIRTSER_ENABLE
+endif
+
 ifeq ($(strip $(AUDIO_ENABLE)), yes)
     OPT_DEFS += -DAUDIO_ENABLE
         SRC += $(QUANTUM_DIR)/process_keycode/process_music.c