diff --git a/packages/firestore/lib/modular/index.d.ts b/packages/firestore/lib/modular/index.d.ts
index af735f8c0af..352e5e43ba8 100644
--- a/packages/firestore/lib/modular/index.d.ts
+++ b/packages/firestore/lib/modular/index.d.ts
@@ -95,17 +95,6 @@ export type WithFieldValue<T> =
       ? { [K in keyof T]: WithFieldValue<T[K]> | FieldValue }
       : never);
 
-/**
- * Returns the existing default {@link Firestore} instance that is associated with the
- * provided {@link @firebase/app#FirebaseApp}. If no instance exists, initializes a new
- * instance with default settings.
- *
- * @param app - The {@link @firebase/app#FirebaseApp} instance that the returned {@link Firestore}
- * instance is associated with.
- * @returns The {@link Firestore} instance of the provided app.
- */
-export function getFirestore(app: FirebaseApp): Firestore;
-
 /**
  * Returns the existing default {@link Firestore} instance that is associated with the
  * default {@link @firebase/app#FirebaseApp}. If no instance exists, initializes a new