diff --git a/mmcls/structures/__init__.py b/mmcls/structures/__init__.py
index 6d6a8af3f99..3021d0a7d0b 100644
--- a/mmcls/structures/__init__.py
+++ b/mmcls/structures/__init__.py
@@ -1,5 +1,6 @@
 # Copyright (c) OpenMMLab. All rights reserved.
 from .cls_data_sample import ClsDataSample
+from .multi_task_data_sample import MultiTaskDataSample
 from .utils import (batch_label_to_onehot, cat_batch_labels,
                     stack_batch_scores, tensor_split)