diff --git a/cpu/kinetis_common/periph/gpio.c b/cpu/kinetis_common/periph/gpio.c
index 9eb5814ed9..2fddfa326f 100644
--- a/cpu/kinetis_common/periph/gpio.c
+++ b/cpu/kinetis_common/periph/gpio.c
@@ -24,6 +24,8 @@
  * @}
  */
 
+#include <stddef.h>
+#include <stdint.h>
 #include "sched.h"
 #include "thread.h"
 #include "cpu.h"