diff --git a/.changeset/dirty-tables-report.md b/.changeset/dirty-tables-report.md
new file mode 100644
index 000000000..09f6c069e
--- /dev/null
+++ b/.changeset/dirty-tables-report.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Allow globbed mdx files to have typed frontmatter
diff --git a/packages/astro/src/@types/astro.ts b/packages/astro/src/@types/astro.ts
index cf966a839..24f1fc8ee 100644
--- a/packages/astro/src/@types/astro.ts
+++ b/packages/astro/src/@types/astro.ts
@@ -241,6 +241,7 @@ export interface AstroGlobalPartial {
 	 */
 	glob(globStr: `${any}.astro`): Promise<AstroInstance[]>;
 	glob<T extends Record<string, any>>(globStr: `${any}.md`): Promise<MarkdownInstance<T>[]>;
+	glob<T extends Record<string, any>>(globStr: `${any}.mdx`): Promise<MarkdownInstance<T>[]>;
 	glob<T extends Record<string, any>>(globStr: string): Promise<T[]>;
 	/**
 	 * Returns a [URL](https://developer.mozilla.org/en-US/docs/Web/API/URL) object built from the [site](https://docs.astro.build/en/reference/configuration-reference/#site) config option