diff --git a/src/routes/Alerts.svelte b/src/routes/Alerts.svelte
index 203a5d2a..0f34654a 100644
--- a/src/routes/Alerts.svelte
+++ b/src/routes/Alerts.svelte
@@ -26,7 +26,7 @@
       // is really upstream of this, but it's an easy fix
       const events = user
         .applyMutes(database.alerts.all())
-        .filter(e => any(k => e[k].length > 0, ["replies", "likedBy", "zappedBy"]) || e.isMention)
+        .filter(e => any(k => e[k]?.length > 0, ["replies", "likedBy", "zappedBy"]) || e.isMention)
 
       notes = sortBy(e => -e.created_at, events).slice(0, limit)
     })