diff --git a/src/renderer/src/components/sidebar/use-worktree-activity-status.ts b/src/renderer/src/components/sidebar/use-worktree-activity-status.ts
index af547f8e886..fb3bc0ae5d8 100644
--- a/src/renderer/src/components/sidebar/use-worktree-activity-status.ts
+++ b/src/renderer/src/components/sidebar/use-worktree-activity-status.ts
@@ -46,7 +46,7 @@ export function useWorktreeActivityStatus(worktreeId: string): WorktreeStatus {
             live = true
           }
         }
-        for (const unsupported of Object.values(s.migrationUnsupportedByPtyId)) {
+        for (const unsupported of Object.values(s.migrationUnsupportedByPtyId ?? {})) {
           const entry = migrationUnsupportedToAgentStatusEntry(unsupported)
           if (!entry) {
             continue