diff --git a/cpp/include/milvus-storage/storage/space.h b/cpp/include/milvus-storage/storage/space.h
index 61edc59..63d2f2e 100644
--- a/cpp/include/milvus-storage/storage/space.h
+++ b/cpp/include/milvus-storage/storage/space.h
@@ -44,7 +44,7 @@ class Space {
 
   std::vector<Blob> StatisticsBlobs();
 
-  arrow::Schema Schema();
+  std::shared_ptr<Schema> schema();
 
   private:
   Status Init();
diff --git a/cpp/src/storage/space.cpp b/cpp/src/storage/space.cpp
index d705f98..8b04021 100644
--- a/cpp/src/storage/space.cpp
+++ b/cpp/src/storage/space.cpp
@@ -307,6 +307,6 @@ Result<std::shared_ptr<arrow::RecordBatchReader>> Space::ScanData() {
   return RecordReader::MakeScanDataReader(manifest_, fs_);
 }
 
-arrow::Schema Space::Schema() { return *manifest_->schema()->schema(); }
+std::shared_ptr<Schema> Space::schema() { return manifest_->schema(); }
 
 }  // namespace milvus_storage