diff --git a/be/src/vec/columns/column_nullable.h b/be/src/vec/columns/column_nullable.h
index 96ac8a8355dd4a..89cd27e8bd0041 100644
--- a/be/src/vec/columns/column_nullable.h
+++ b/be/src/vec/columns/column_nullable.h
@@ -353,6 +353,8 @@ class ColumnNullable final : public COWHelper<IColumn, ColumnNullable> {
 
         if (!nullable_rhs.is_null_at(row)) {
             nested_column->replace_column_data(*nullable_rhs.nested_column, row, self_row);
+        } else {
+            nested_column->replace_column_data_default(self_row);
         }
     }