diff --git a/frontend/src/routes/device/[id]/+page.svelte b/frontend/src/routes/device/[id]/+page.svelte
index 638e7fea..bd3dac5e 100644
--- a/frontend/src/routes/device/[id]/+page.svelte
+++ b/frontend/src/routes/device/[id]/+page.svelte
@@ -4,7 +4,7 @@
 
     export let data;
     let device = $devices[data.params.id];
-    if (!device.expand.ports) {
+    if (!device?.expand?.ports) {
         device.expand.ports = [];
     }
 </script>