diff --git a/src/main/java/com/budwk/app/sys/controller/SysUnitController.java b/src/main/java/com/budwk/app/sys/controller/SysUnitController.java
index 22c19951..6aad02ab 100644
--- a/src/main/java/com/budwk/app/sys/controller/SysUnitController.java
+++ b/src/main/java/com/budwk/app/sys/controller/SysUnitController.java
@@ -299,7 +299,7 @@ public class SysUnitController {
                                 )
                         ));
             }
-            List<Tree<String>> treeList = TreeUtil.build(nodeList, StrUtil.blankToDefault(pid, "J"));
+            List<Tree<String>> treeList = TreeUtil.build(nodeList, StrUtil.blankToDefault(pid, "0"));
             return Result.success(treeList);
         } catch (Exception e) {
             return Result.error();