diff --git a/tools/etcd-dump-metrics/install_windows.go b/tools/etcd-dump-metrics/install_windows.go
index cbb3d102550..a7aa8563ab3 100644
--- a/tools/etcd-dump-metrics/install_windows.go
+++ b/tools/etcd-dump-metrics/install_windows.go
@@ -18,6 +18,6 @@ package main
 
 import "errors"
 
-func install(ver, dir string) error {
-	return errors.New("windows install is not supported yet")
+func install(ver, dir string) (string, error) {
+	return "", errors.New("windows install is not supported yet")
 }