diff --git a/.changeset/plenty-cows-act.md b/.changeset/plenty-cows-act.md
new file mode 100644
index 000000000000..7b76a769d6c7
--- /dev/null
+++ b/.changeset/plenty-cows-act.md
@@ -0,0 +1,5 @@
+---
+'@astrojs/markdoc': patch
+---
+
+Fix: add `headings` to Markdoc `render()` return type.
diff --git a/packages/integrations/markdoc/template/content-module-types.d.ts b/packages/integrations/markdoc/template/content-module-types.d.ts
index 7b82eb18a1fe..193f4c6f2912 100644
--- a/packages/integrations/markdoc/template/content-module-types.d.ts
+++ b/packages/integrations/markdoc/template/content-module-types.d.ts
@@ -2,6 +2,7 @@ declare module 'astro:content' {
 	interface Render {
 		'.mdoc': Promise<{
 			Content(props: Record<string, any>): import('astro').MarkdownInstance<{}>['Content'];
+			headings: import('astro').MarkdownHeading[];
 		}>;
 	}
 }