diff --git a/README.md b/README.md
index e1b6a26c..9cc79cc0 100644
--- a/README.md
+++ b/README.md
@@ -249,6 +249,13 @@ ControlNet-LLLite, a novel method for ControlNet with SDXL, is added. See [docum
 
 ## Change History
 
+### Masked loss
+
+`train_network.py` and `sdxl_train_network.py` now support the masked loss. `--masked_loss` option is added. 
+
+ControlNet dataset is used to specify the mask. The mask images should be the RGB images. The pixel value 255 in R channel is treated as the mask (the loss is calculated only for the pixels with the mask), and 0 is treated as the non-mask. See details for the dataset specification in the [LLLite documentation](./docs/train_lllite_README.md#preparing-the-dataset).
+
+
 ### Working in progress
 
 - `train_network.py` and `sdxl_train_network.py` are modified to record some dataset settings in the metadata of the trained model (`caption_prefix`, `caption_suffix`, `keep_tokens_separator`, `secondary_separator`, `enable_wildcard`).