diff --git a/packages/core-compat-api/api-report.md b/packages/core-compat-api/api-report.md
index 5175c76ac8..3dd2eb6b22 100644
--- a/packages/core-compat-api/api-report.md
+++ b/packages/core-compat-api/api-report.md
@@ -6,11 +6,18 @@
 /// <reference types="react" />
 
 import { BackstagePlugin } from '@backstage/frontend-plugin-api';
+import { ExtensionOverrides } from '@backstage/frontend-plugin-api';
+import { default as React_2 } from 'react';
 
 // @public (undocumented)
 export function collectLegacyRoutes(
   flatRoutesElement: JSX.Element,
 ): BackstagePlugin[];
 
+// @public (undocumented)
+export function convertLegacyApp(
+  rootElement: React_2.JSX.Element,
+): (ExtensionOverrides | BackstagePlugin)[];
+
 // (No @packageDocumentation comment for this package)
 ```
diff --git a/packages/core-compat-api/src/convertLegacyApp.ts b/packages/core-compat-api/src/convertLegacyApp.ts
index 9343744075..59cb136c65 100644
--- a/packages/core-compat-api/src/convertLegacyApp.ts
+++ b/packages/core-compat-api/src/convertLegacyApp.ts
@@ -58,6 +58,7 @@ function selectChildren(
   });
 }
 
+/** @public */
 export function convertLegacyApp(
   rootElement: React.JSX.Element,
 ): (ExtensionOverrides | BackstagePlugin)[] {