diff --git a/zefie_wtvp_minisrv/ServiceVault/wtv-1800/preregister.js b/zefie_wtvp_minisrv/ServiceVault/wtv-1800/preregister.js
index fd2bfc70..9255c1c1 100644
--- a/zefie_wtvp_minisrv/ServiceVault/wtv-1800/preregister.js
+++ b/zefie_wtvp_minisrv/ServiceVault/wtv-1800/preregister.js
@@ -123,7 +123,7 @@ if (ssid_sessions[socket.ssid].data_store.wtvsec_login) {
 
 	if (request_headers.query.guest_login) {
 		send_tellyscript = false;
-		gourl += "&guest_login=true"
+		if (gourl != null) gourl += "&guest_login=true"
 		if (request_headers.query.skip_splash) gourl += "&skip_splash=true";
 	}