diff --git a/variants/nina_w10/pins_arduino.h b/variants/nina_w10/pins_arduino.h
index 2b80c8ff..f3ce937d 100644
--- a/variants/nina_w10/pins_arduino.h
+++ b/variants/nina_w10/pins_arduino.h
@@ -1,6 +1,8 @@
 #ifndef Pins_Arduino_h
 #define Pins_Arduino_h
 
+#include <stdint.h>
+
 #define EXTERNAL_NUM_INTERRUPTS 16
 #define NUM_DIGITAL_PINS        40
 #define NUM_ANALOG_INPUTS       16