diff --git a/visualizer.mk b/visualizer.mk
index ff4b61f08..e6e0d63d0 100644
--- a/visualizer.mk
+++ b/visualizer.mk
@@ -33,3 +33,8 @@ SRC += $(VISUALIZER_DIR)/lcd_backlight.c
 SRC += lcd_backlight_hal.c
 OPT_DEFS += -DLCD_BACKLIGHT_ENABLE
 endif
+
+ifndef VISUALIZER_USER
+VISUALIZER_USER = visualizer_user.c
+endif
+SRC += $(VISUALIZER_USER)
\ No newline at end of file