diff --git a/pkg/apis/options/options.go b/pkg/apis/options/options.go
index 528804545f..f6198a54d9 100644
--- a/pkg/apis/options/options.go
+++ b/pkg/apis/options/options.go
@@ -128,6 +128,7 @@ func NewFlagSet() *pflag.FlagSet {
 	flagSet.StringSlice("trusted-ip", []string{}, "list of IPs or CIDR ranges to allow to bypass authentication. WARNING: trusting by IP has inherent security flaws, read the configuration documentation for more information.")
 	flagSet.Bool("force-https", false, "force HTTPS redirect for HTTP requests")
 	flagSet.String("redirect-url", "", "the OAuth Redirect URL. ie: \"https://internalapp.yourcompany.com/oauth2/callback\"")
+	flagSet.Bool("relative-redirect-url", false, "allow relative OAuth Redirect URL.")
 	flagSet.StringSlice("skip-auth-regex", []string{}, "(DEPRECATED for --skip-auth-route) bypass authentication for requests path's that match (may be given multiple times)")
 	flagSet.StringSlice("skip-auth-route", []string{}, "bypass authentication for requests that match the method & path. Format: method=path_regex OR method!=path_regex. For all methods: path_regex OR !=path_regex")
 	flagSet.StringSlice("api-route", []string{}, "return HTTP 401 instead of redirecting to authentication server if token is not valid. Format: path_regex")