diff --git a/.changeset/fix_sorting_devices_by_last_active_time_when_some_devices_have_a_missing_last_active_time.md b/.changeset/fix_sorting_devices_by_last_active_time_when_some_devices_have_a_missing_last_active_time.md
new file mode 100644
index 0000000000..4adac9fbdd
--- /dev/null
+++ b/.changeset/fix_sorting_devices_by_last_active_time_when_some_devices_have_a_missing_last_active_time.md
@@ -0,0 +1,5 @@
+---
+default: patch
+---
+
+# Fix sorting devices by last active time when some devices have a missing last active time.
diff --git a/src/app/features/settings/devices/OtherDevices.tsx b/src/app/features/settings/devices/OtherDevices.tsx
index 0dec613f1e..dd6ca6b3f0 100644
--- a/src/app/features/settings/devices/OtherDevices.tsx
+++ b/src/app/features/settings/devices/OtherDevices.tsx
@@ -186,8 +186,7 @@ export function OtherDevices({ devices, refreshDeviceList, showVerification }: O
         )}
         {devices
           .toSorted((d1, d2) => {
-            if (!d1.last_seen_ts || !d2.last_seen_ts) return 0;
-            return d1.last_seen_ts < d2.last_seen_ts ? 1 : -1;
+            return (d1.last_seen_ts ?? 0) < (d2.last_seen_ts ?? 0) ? 1 : -1;
           })
           .map((device) => (
             <SequenceCard