diff --git a/tests/driver_ina3221/main.c b/tests/driver_ina3221/main.c
index af2a5551da..334408a631 100644
--- a/tests/driver_ina3221/main.c
+++ b/tests/driver_ina3221/main.c
@@ -18,6 +18,7 @@
  * @}
  */
 
+#include <stdio.h>
 #include <string.h>
 #include "periph/gpio.h"
 #include "xtimer.h"