diff --git a/MCUME_pico2/usb_kbd/kbd.h b/MCUME_pico2/usb_kbd/kbd.h
index c9435a6..ecab935 100755
--- a/MCUME_pico2/usb_kbd/kbd.h
+++ b/MCUME_pico2/usb_kbd/kbd.h
@@ -1,3 +1,5 @@
+#include <stdint.h>
+
 #define KBD_FLAG_LSHIFT    0x01
 #define KBD_FLAG_LCONTROL  0x02
 #define KBD_FLAG_LALT      0x04