diff --git a/mmdet/datasets/pipelines/transforms.py b/mmdet/datasets/pipelines/transforms.py
index cb5945d2832..d39d383d35d 100644
--- a/mmdet/datasets/pipelines/transforms.py
+++ b/mmdet/datasets/pipelines/transforms.py
@@ -2187,8 +2187,8 @@ def _filter_box_candidates(self, bboxes, labels):
 
     def __repr__(self):
         repr_str = self.__class__.__name__
-        repr_str += f'img_scale={self.img_scale}, '
-        repr_str += f'center_ratio_range={self.center_ratio_range})'
+        repr_str += f'(img_scale={self.img_scale}, '
+        repr_str += f'center_ratio_range={self.center_ratio_range}, '
         repr_str += f'pad_val={self.pad_val})'
         return repr_str