diff --git a/packages/backend/src/misc/antenna-cache.ts b/packages/backend/src/misc/antenna-cache.ts
index 97249c146..6523d89b6 100644
--- a/packages/backend/src/misc/antenna-cache.ts
+++ b/packages/backend/src/misc/antenna-cache.ts
@@ -5,7 +5,7 @@ import { subscriber } from '@/db/redis.js';
 let antennasFetched = false;
 let antennas: Antenna[] = [];
 
-export async function getAntennas() {
+export async function getAntennas(): Promise<Antenna[]> {
 	if (!antennasFetched) {
 		antennas = await Antennas.find();
 		antennasFetched = true;