diff --git a/google-cloud-firestore/src/main/java/com/google/cloud/firestore/Internal.java b/google-cloud-firestore/src/main/java/com/google/cloud/firestore/Internal.java
index e619edb46..3d1bbc4f4 100644
--- a/google-cloud-firestore/src/main/java/com/google/cloud/firestore/Internal.java
+++ b/google-cloud-firestore/src/main/java/com/google/cloud/firestore/Internal.java
@@ -65,4 +65,9 @@ public DocumentSnapshot snapshotFromProto(Timestamp readTime, Document document)
   public Map<String, Value> protoFromSnapshot(DocumentSnapshot snapshot) {
     return snapshot.getProtoFields();
   }
+
+  @InternalApi
+  public static String autoId() {
+    return FirestoreImpl.autoId();
+  }
 }