diff --git a/src/vs/workbench/contrib/notebook/browser/contrib/coreActions.ts b/src/vs/workbench/contrib/notebook/browser/contrib/coreActions.ts
index bfed6ef00ef..3b0d367feb6 100644
--- a/src/vs/workbench/contrib/notebook/browser/contrib/coreActions.ts
+++ b/src/vs/workbench/contrib/notebook/browser/contrib/coreActions.ts
@@ -925,7 +925,7 @@ registerAction2(class ChangeCellToMarkdownAction extends NotebookCellAction {
 	}
 
 	async runWithContext(accessor: ServicesAccessor, context: INotebookCellActionContext): Promise<void> {
-		await changeCellToKind(CellKind.Markup, context);
+		await changeCellToKind(CellKind.Markup, context, 'markdown');
 	}
 });