diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index 4095431..92ea1ab 100644
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -14,6 +14,7 @@
 #include "wacom_wac.h"
 #include "wacom.h"
 #include <linux/input/mt.h>
+#include <linux/usb.h>
 
 #define WAC_MSG_RETRIES		5
 #define WAC_CMD_RETRIES		10