diff --git a/include/usb/s3c_udc.h b/include/usb/s3c_udc.h
index 6dead2f..ce3dd2c 100644
--- a/include/usb/s3c_udc.h
+++ b/include/usb/s3c_udc.h
@@ -10,6 +10,7 @@
 #define __S3C_USB_GADGET
 
 #include <asm/errno.h>
+#include <asm/sizes.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
 #include <linux/list.h>