diff --git a/nextjs-start/src/lib/firebase/firestore.js b/nextjs-start/src/lib/firebase/firestore.js
index 690baa0fd..fa4c570ad 100644
--- a/nextjs-start/src/lib/firebase/firestore.js
+++ b/nextjs-start/src/lib/firebase/firestore.js
@@ -50,7 +50,7 @@ export async function getRestaurants(db = db, filters = {}) {
 }
 
 export function getRestaurantsSnapshot(cb, filters = {}) {
-	return;
+	return () => {};
 }
 
 export async function getRestaurantById(db, restaurantId) {
@@ -67,7 +67,7 @@ export async function getRestaurantById(db, restaurantId) {
 }
 
 export function getRestaurantSnapshotById(restaurantId, cb) {
-	return;
+	return () => {};
 }
 
 export async function getReviewsByRestaurantId(db, restaurantId) {