diff --git a/monai/losses/dice.py b/monai/losses/dice.py
index 948749606b..2d07b17aa2 100644
--- a/monai/losses/dice.py
+++ b/monai/losses/dice.py
@@ -27,7 +27,7 @@
 from monai.networks import one_hot
 from monai.utils import DiceCEReduction, LossReduction, Weight, look_up_option
 
-
+# TODO: Implement ignore_index support (#8734)
 class DiceLoss(_Loss):
     """
     Compute average Dice loss between two tensors. It can support both multi-classes and multi-labels tasks.