diff --git a/src/invoke_training/_shared/data/datasets/image_caption_jsonl_dataset.py b/src/invoke_training/_shared/data/datasets/image_caption_jsonl_dataset.py
index 41877225..81b9f0a2 100644
--- a/src/invoke_training/_shared/data/datasets/image_caption_jsonl_dataset.py
+++ b/src/invoke_training/_shared/data/datasets/image_caption_jsonl_dataset.py
@@ -55,7 +55,13 @@ def __init__(
     def save_jsonl(self):
         data = []
         for example in self.examples:
-            data.append({self._image_column: example.image_path, self._caption_column: example.caption})
+            data.append(
+                {
+                    self._image_column: example.image_path,
+                    self._caption_column: example.caption,
+                    MASK_COLUMN_DEFAULT: example.mask_path,
+                }
+            )
         save_jsonl(data, self._jsonl_path)
 
     def _get_image_path(self, idx: int) -> str:
diff --git a/tests/invoke_training/_shared/data/datasets/test_image_caption_jsonl_dataset.py b/tests/invoke_training/_shared/data/datasets/test_image_caption_jsonl_dataset.py
index a0aa2380..a6d27b9f 100644
--- a/tests/invoke_training/_shared/data/datasets/test_image_caption_jsonl_dataset.py
+++ b/tests/invoke_training/_shared/data/datasets/test_image_caption_jsonl_dataset.py
@@ -1,6 +1,10 @@
+import shutil
+from pathlib import Path
+
 import PIL.Image
 
 from invoke_training._shared.data.datasets.image_caption_jsonl_dataset import ImageCaptionJsonlDataset
+from invoke_training._shared.utils.jsonl import load_jsonl
 
 from ..dataset_fixtures import image_caption_jsonl  # noqa: F401
 
@@ -52,3 +56,21 @@ def test_image_caption_jsonl_dataset_get_image_dimensions(image_caption_jsonl):
     image_dims = dataset.get_image_dimensions()
 
     assert len(image_dims) == len(dataset)
+
+
+def test_image_caption_jsonl_dataset_save_jsonl(image_caption_jsonl, tmp_path: Path):  # noqa: F811
+    # Create a copy of the image_caption_jsonl file to avoid modifying the original file.
+    image_caption_jsonl_copy = tmp_path / "test.jsonl"
+    shutil.copy(image_caption_jsonl, image_caption_jsonl_copy)
+
+    # Load the dataset from the copied jsonl file.
+    dataset = ImageCaptionJsonlDataset(str(image_caption_jsonl))
+
+    # Save the dataset to a new jsonl file.
+    dataset.save_jsonl()
+
+    # Verify that the roundtrip was successful.
+    assert image_caption_jsonl != image_caption_jsonl_copy
+    original_jsonl = load_jsonl(image_caption_jsonl)
+    roundtrip_jsonl = load_jsonl(image_caption_jsonl_copy)
+    assert original_jsonl == roundtrip_jsonl