diff --git a/src/features/background-agent/loop-detector.ts b/src/features/background-agent/loop-detector.ts
index afcbe4abb..ecfcf23f3 100644
--- a/src/features/background-agent/loop-detector.ts
+++ b/src/features/background-agent/loop-detector.ts
@@ -62,7 +62,7 @@ export function recordToolCall(
 }
 
 function sortObject(obj: unknown): unknown {
-  if (obj === null || obj === undefined) return obj
+  if (obj == null) return obj
   if (typeof obj !== "object") return obj
   if (Array.isArray(obj)) return obj.map(sortObject)