diff --git a/tests/driver_ph_oem/main.c b/tests/driver_ph_oem/main.c
index a5ed6e9c9a..0bc663051a 100644
--- a/tests/driver_ph_oem/main.c
+++ b/tests/driver_ph_oem/main.c
@@ -18,6 +18,8 @@
  * @}
  */
 
+#include <stdio.h>
+
 #include "xtimer.h"
 #include "event/callback.h"