diff --git a/hutool-core/src/main/java/cn/hutool/core/stream/CollectorUtil.java b/hutool-core/src/main/java/cn/hutool/core/stream/CollectorUtil.java
index 193a18645..29c485a49 100644
--- a/hutool-core/src/main/java/cn/hutool/core/stream/CollectorUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/stream/CollectorUtil.java
@@ -487,7 +487,7 @@ public class CollectorUtil {
 				childrenSetter.accept(parent, children);
 				recursiveRef.get().accept(children);
 			});
-			List<T> parents = parentFactory.apply(pIdValuesMap);
+			final List<T> parents = parentFactory.apply(pIdValuesMap);
 			if (!parents.isEmpty()) {
 				recursiveRef.set(recursive);
 				recursiveRef.get().accept(parents);