diff --git a/.changeset/neat-crews-rule.md b/.changeset/neat-crews-rule.md
new file mode 100644
index 00000000000..2b140b68814
--- /dev/null
+++ b/.changeset/neat-crews-rule.md
@@ -0,0 +1,5 @@
+---
+"@firebase/firestore": patch
+---
+
+Internal changes to support upcoming modular API.
diff --git a/packages/firestore/lite/src/api/transaction.ts b/packages/firestore/lite/src/api/transaction.ts
index d29cde7d498..bd84a9ece3a 100644
--- a/packages/firestore/lite/src/api/transaction.ts
+++ b/packages/firestore/lite/src/api/transaction.ts
@@ -123,9 +123,14 @@ export class Transaction {
    *
    * @param documentRef A reference to the document to be set.
    * @param data An object of the fields and values for the document.
+   * @param options An object to configure the set behavior.
    * @return This `Transaction` instance. Used for chaining method calls.
    */
-  set<T>(documentRef: DocumentReference<T>, data: Partial<T>): this;
+  set<T>(
+    documentRef: DocumentReference<T>,
+    data: Partial<T>,
+    options: SetOptions
+  ): this;
   set<T>(
     documentRef: DocumentReference<T>,
     value: T,