diff --git a/velox/connectors/hive/storage_adapters/hdfs/HdfsFileSystem.h b/velox/connectors/hive/storage_adapters/hdfs/HdfsFileSystem.h
index a3e9a8efe5d10..4c93b125fb2ed 100644
--- a/velox/connectors/hive/storage_adapters/hdfs/HdfsFileSystem.h
+++ b/velox/connectors/hive/storage_adapters/hdfs/HdfsFileSystem.h
@@ -15,12 +15,12 @@
  */
 #include "velox/common/file/FileSystems.h"
 
-namespace velox::filesystems::arrow::io::internal {
+namespace facebook::velox::filesystems {
+
+namespace arrow::io::internal {
 class LibHdfsShim;
 }
 
-namespace facebook::velox::filesystems {
-
 struct HdfsServiceEndpoint {
   HdfsServiceEndpoint(const std::string& hdfsHost, const std::string& hdfsPort)
       : host(hdfsHost), port(hdfsPort) {}