diff --git a/firmware/export/config/mini2440.h b/firmware/export/config/mini2440.h
index 614db201fb..4b4a137110 100644
--- a/firmware/export/config/mini2440.h
+++ b/firmware/export/config/mini2440.h
@@ -60,6 +60,7 @@
 /* LCD dimensions */
 #define LCD_WIDTH  240
 #define LCD_HEIGHT 320
+#define LCD_DPI    114  /* 400 pixels diagonally / 3.5 inch */
 /* The LCD is configured for RGB565 */
 #define LCD_DEPTH  16          /* 65536 colours */
 #define LCD_PIXELFORMAT RGB565 /* rgb565 */