diff --git a/upgrade/upgrade_unsupp.go b/upgrade/upgrade_unsupp.go
index 787adb078..34db0a3a4 100644
--- a/upgrade/upgrade_unsupp.go
+++ b/upgrade/upgrade_unsupp.go
@@ -6,7 +6,7 @@
 
 package upgrade
 
-func UpgradeTo(rel Release) error {
+func UpgradeTo(rel Release, extra string) error {
 	return ErrUpgradeUnsupported
 }