diff --git a/app/Services/PostcodeService.php b/app/Services/PostcodeService.php
index 2c0fd0b..e05af9d 100644
--- a/app/Services/PostcodeService.php
+++ b/app/Services/PostcodeService.php
@@ -28,7 +28,7 @@ class PostcodeService
 
         $cached = Cache::get($cacheKey);
 
-        if ($cached !== null) {
+        if ($cached instanceof LocationResult) {
             return $cached;
         }