diff --git a/Makefile b/Makefile
index a0d56d1a..e1bf8414 100644
--- a/Makefile
+++ b/Makefile
@@ -25,6 +25,15 @@ ifeq ($(SENSOR), TEMPERATURE)
   DEFINES += -DTEMPERATURE_BOARD_INSTALLED
 endif
 
+ifdef FORCE_DISPLAY_TYPE
+  ifeq ($(FORCE_DISPLAY_TYPE), CUSTOM)
+    DEFINES += -DFORCE_CUSTOM_LCD_TYPE
+  endif
+  ifeq ($(FORCE_DISPLAY_TYPE), CLASSIC)
+    DEFINES += -DFORCE_CLASSIC_LCD_TYPE
+  endif
+endif
+
 ifdef EMSCRIPTEN
 all: $(BUILD)/$(BIN).elf $(BUILD)/$(BIN).html
 $(BUILD)/$(BIN).html: $(OBJS)