diff --git a/tests/periph_uart/main.c b/tests/periph_uart/main.c
index 8aaa58f7c1..af97edb9c1 100644
--- a/tests/periph_uart/main.c
+++ b/tests/periph_uart/main.c
@@ -28,6 +28,7 @@
 #include "msg.h"
 #include "ringbuffer.h"
 #include "periph/uart.h"
+#include "uart_stdio.h"
 
 #define SHELL_BUFSIZE       (128U)
 #define UART_BUFSIZE        (128U)