diff --git a/packages/firebase/empty-import.d.ts b/packages/firebase/empty-import.d.ts
index 690b11ed73b..6d550e15171 100644
--- a/packages/firebase/empty-import.d.ts
+++ b/packages/firebase/empty-import.d.ts
@@ -15,4 +15,6 @@
  * limitations under the License.
  */
 
-export = undefined;
+declare namespace empty {}
+
+export = empty;