diff --git a/interfaces/kits/ndk/clouddiskmanager/src/oh_cloud_disk_manager.cpp b/interfaces/kits/ndk/clouddiskmanager/src/oh_cloud_disk_manager.cpp
index 86ad44ac52f220058ba0bb85c82b25431463c86d..c75e1f7b209c745d438cad8b1a498780f958585a 100644
--- a/interfaces/kits/ndk/clouddiskmanager/src/oh_cloud_disk_manager.cpp
+++ b/interfaces/kits/ndk/clouddiskmanager/src/oh_cloud_disk_manager.cpp
@@ -439,14 +439,17 @@ CloudDisk_ErrorCode OH_CloudDisk_UpdateCustomAlias(const CloudDisk_SyncFolderPat
         LOGE("Invalid argument, path is invalid");
         return CloudDisk_ErrorCode::CLOUD_DISK_INVALID_ARG;
     }
-
-    if (!IsValidPathInfo(customAlias, customAliasLength)) {
-        LOGE("Invalid argument, name is invalid");
+    if (customAlias != nullptr && strnlen(customAlias, customAliasLength + 1) != customAliasLength) {
+        LOGE("Invalid argument, customAlias is invalid");
         return CloudDisk_ErrorCode::CLOUD_DISK_INVALID_ARG;
     }
+    std::string customAliasStr = "";
+    if (customAlias != nullptr) {
+        customAliasStr = std::string(customAlias, customAliasLength);
+    }
 
     int32_t ret = OHOS::FileManagement::CloudDiskSyncFolderManager::GetInstance().UpdateDisplayName(
-        string(syncFolderPath.value, syncFolderPath.length), string(customAlias, customAliasLength));
+        string(syncFolderPath.value, syncFolderPath.length), customAliasStr);
     LOGI("Update display name, ret: %{public}d", ret);
     return ConvertToErrorCode(ret);
 }