diff --git a/boards/arduino-due/include/periph_conf.h b/boards/arduino-due/include/periph_conf.h
index d90eefa2cb1eec5261527b524b80afe83bfcc5b7..e246e1eec43abbd74e232c09e5dcffcd3ea32de9 100644
--- a/boards/arduino-due/include/periph_conf.h
+++ b/boards/arduino-due/include/periph_conf.h
@@ -65,7 +65,6 @@ extern "C" {
 #define UART_1_EN           1
 #define UART_2_EN           1
 #define UART_3_EN           1
-#define UART_IRQ_PRIO       1
 
 /* UART 0 device configuration */
 #define UART_0_DEV          UART