diff --git a/mmedit/evaluation/metrics/metrics_utils.py b/mmedit/evaluation/metrics/metrics_utils.py
index 4ed5602a64..64630454f4 100644
--- a/mmedit/evaluation/metrics/metrics_utils.py
+++ b/mmedit/evaluation/metrics/metrics_utils.py
@@ -121,7 +121,7 @@ def img_transform(img,
                          '"Y" and None.')
 
     if crop_border != 0:
-        img = img[crop_border:-crop_border, crop_border:-crop_border, None]
+        img = img[crop_border:-crop_border, crop_border:-crop_border, ...]
 
     return img