diff --git a/drivers/usb/gadget/function/u_ether_configfs.h b/drivers/usb/gadget/function/u_ether_configfs.h
index 39d3a261496d..217990a266b2 100644
--- a/drivers/usb/gadget/function/u_ether_configfs.h
+++ b/drivers/usb/gadget/function/u_ether_configfs.h
@@ -14,6 +14,7 @@
 #define __U_ETHER_CONFIGFS_H
 
 #include <linux/cleanup.h>
+#include <linux/hex.h>
 #include <linux/if_ether.h>
 #include <linux/mutex.h>
 #include <linux/netdevice.h>