diff --git a/src/Elastic.Markdown/IO/MarkdownFile.cs b/src/Elastic.Markdown/IO/MarkdownFile.cs
index 3db1e1bf6..31c714051 100644
--- a/src/Elastic.Markdown/IO/MarkdownFile.cs
+++ b/src/Elastic.Markdown/IO/MarkdownFile.cs
@@ -292,7 +292,12 @@ public static List<PageTocItem> GetAnchors(
 			.Select(h =>
 			{
 				var header = h.Item1!.StripMarkdown();
-				return new PageTocItem { Heading = header, Slug = (h.Item2 ?? header).Slugify(), Level = h.Level };
+				return new PageTocItem
+				{
+					Heading = header,
+					Slug = (h.Item2 ?? h.Item1).Slugify(),
+					Level = h.Level
+				};
 			})
 			.Concat(includedTocs)
 			.Select(toc => subs.Count == 0