diff --git a/demos/AVR/RT-ARDUINOMEGA/mcuconf.h b/demos/AVR/RT-ARDUINOMEGA/mcuconf.h
index c801a12d3..316262607 100644
--- a/demos/AVR/RT-ARDUINOMEGA/mcuconf.h
+++ b/demos/AVR/RT-ARDUINOMEGA/mcuconf.h
@@ -30,6 +30,16 @@
  */
 #define AVR_ADC_USE_ADC1                   FALSE
 
+/*
+ * EXT drivers system settings.
+ */
+#define AVR_EXT_USE_INT0                   FALSE
+#define AVR_EXT_USE_INT1                   FALSE
+#define AVR_EXT_USE_INT2                   FALSE
+#define AVR_EXT_USE_INT3                   FALSE
+#define AVR_EXT_USE_INT4                   FALSE
+#define AVR_EXT_USE_INT5                   FALSE
+
 /*
  * CAN driver system settings.
  */