diff --git a/library/train_util.py b/library/train_util.py
index 5433357ac..51610e700 100644
--- a/library/train_util.py
+++ b/library/train_util.py
@@ -96,6 +96,7 @@
 except:
     pass
 
+# JPEG-XL on Linux
 try:
     from jxlpy import JXLImagePlugin
 
@@ -103,6 +104,14 @@
 except:
     pass
 
+# JPEG-XL on Windows
+try:
+    import pillow_jxl
+
+    IMAGE_EXTENSIONS.extend([".jxl", ".JXL"])
+except:
+    pass
+
 IMAGE_TRANSFORMS = transforms.Compose(
     [
         transforms.ToTensor(),