diff --git a/client/src/services/adsb.ts b/client/src/services/adsb.ts
index 7073f16..9cec171 100644
--- a/client/src/services/adsb.ts
+++ b/client/src/services/adsb.ts
@@ -82,7 +82,7 @@ export class AirTrafficLayer {
 	}
 
 	private async _fetch() {
-		const j = await fetch(`${API}/adsb`).then(r => r.json())
+		const j = await fetch(`${API}/adsb`).then(r => r.ok ? r.json() : []);
 		this.data = (j || []).map((a: any) => ({
 			...a,
 			icao:      a.hex,