diff --git a/demos/AVR-ArduinoMega-GCC/mcuconf.h b/demos/AVR-ArduinoMega-GCC/mcuconf.h
index ea38d4385..76c735b14 100644
--- a/demos/AVR-ArduinoMega-GCC/mcuconf.h
+++ b/demos/AVR-ArduinoMega-GCC/mcuconf.h
@@ -52,4 +52,5 @@
 /*
  * SPI driver system settings.
  */
-#define USE_AVR_SPI                 FALSE
+#define AVR_SPI_USE_SPI1            FALSE
+#define AVR_SPI_USE_16BIT_POLLED_EXCHANGE FALSE