diff --git a/bochs/iodev/usb/usb_hid.cc b/bochs/iodev/usb/usb_hid.cc
index 160505f61..1700dfab0 100644
--- a/bochs/iodev/usb/usb_hid.cc
+++ b/bochs/iodev/usb/usb_hid.cc
@@ -39,6 +39,7 @@
 #if BX_SUPPORT_PCI && BX_SUPPORT_PCIUSB
 #include "usb_common.h"
 #include "usb_hid.h"
+#include <cstddef>
 
 #define LOG_THIS