diff --git a/src/nostalgia/core/studio/tilesheeteditormodel.cpp b/src/nostalgia/core/studio/tilesheeteditormodel.cpp
index 48f29d15..85c8e32d 100644
--- a/src/nostalgia/core/studio/tilesheeteditormodel.cpp
+++ b/src/nostalgia/core/studio/tilesheeteditormodel.cpp
@@ -16,8 +16,7 @@ TileSheetEditorModel::TileSheetEditorModel(Context *ctx, const ox::String &path)
 	oxRequireT(img, readObj<TileSheet>(ctx, path.c_str()));
 	m_img = *img;
 	oxThrowError(readObj<Palette>(ctx, m_img.defaultPalette).moveTo(&m_pal));
-	m_undoStack.undoTriggered.connect(this, &TileSheetEditorModel::markUpdated);
-	m_undoStack.redoTriggered.connect(this, &TileSheetEditorModel::markUpdated);
+	m_undoStack.changeTriggered.connect(this, &TileSheetEditorModel::markUpdated);
 }
 
 void TileSheetEditorModel::cut() {
@@ -58,8 +57,8 @@ void TileSheetEditorModel::ackUpdate() noexcept {
 }
 
 ox::Error TileSheetEditorModel::saveFile() noexcept {
-	oxRequire(buff, ox::writeClaw(&m_img));
-	oxReturnError(m_ctx->rom->write(m_path.c_str(), buff.data(), buff.size()));
+	auto sctx = applicationData<studio::StudioContext>(m_ctx);
+	oxReturnError(sctx->project->writeObj(m_path, &m_img));
 	return m_ctx->assetManager.setAsset(m_path, m_img).error;
 }
 
@@ -101,4 +100,4 @@ void TileSheetEditorModel::pushCommand(studio::UndoCommand *cmd) noexcept {
 	m_updated = true;
 }
 
-}
\ No newline at end of file
+}