diff --git a/dbms/src/Storages/DeltaMerge/File/DMFileWriter.cpp b/dbms/src/Storages/DeltaMerge/File/DMFileWriter.cpp
index 9c37eb6e86c..780567b22ff 100644
--- a/dbms/src/Storages/DeltaMerge/File/DMFileWriter.cpp
+++ b/dbms/src/Storages/DeltaMerge/File/DMFileWriter.cpp
@@ -73,7 +73,9 @@ DMFileWriter::DMFileWriter(
                 .avg_size = 0,
                 // ... here ignore some fields with default initializers
                 .vector_index = {},
+#ifndef NDEBUG
                 .additional_data_for_test = {},
+#endif
             });
     }
 }