diff --git a/src/main/java/im/zhaojun/zfile/module/onlyoffice/controller/OnlyOfficeController.java b/src/main/java/im/zhaojun/zfile/module/onlyoffice/controller/OnlyOfficeController.java
index f0b5cf4..071e33a 100644
--- a/src/main/java/im/zhaojun/zfile/module/onlyoffice/controller/OnlyOfficeController.java
+++ b/src/main/java/im/zhaojun/zfile/module/onlyoffice/controller/OnlyOfficeController.java
@@ -102,7 +102,7 @@ public class OnlyOfficeController {
             }
 
             String currentUserBasePath = fileService.getCurrentUserBasePath();
-            fileItemRequest.setPath(currentUserBasePath + fileItemRequest.getPath());
+            fileItemRequest.setPath(StringUtils.concat(currentUserBasePath, fileItemRequest.getPath()));
 
             boolean hasUploadPermission = userStorageSourceService.hasCurrentUserStorageOperatorPermission(storageId, FileOperatorTypeEnum.UPLOAD);
             return Pair.of(fileItem, hasUploadPermission);