diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c
index a50743caf083..1a0fbc808ee2 100644
--- a/drivers/usb/gadget/function/f_mass_storage.c
+++ b/drivers/usb/gadget/function/f_mass_storage.c
@@ -2960,7 +2960,7 @@ EXPORT_SYMBOL_GPL(fsg_common_create_lun);
 
 int fsg_common_create_luns(struct fsg_common *common, struct fsg_config *cfg)
 {
-	char buf[8]; /* enough for 100000000 different numbers, decimal */
+	char buf[14];
 	int i, rc;
 
 	fsg_common_remove_luns(common);