diff --git a/packages/cloud_firestore/cloud_firestore/android/src/main/java/io/flutter/plugins/firebase/firestore/FlutterFirebaseFirestoreMessageCodec.java b/packages/cloud_firestore/cloud_firestore/android/src/main/java/io/flutter/plugins/firebase/firestore/FlutterFirebaseFirestoreMessageCodec.java
index 48dc24cd6857..2ff3623778dc 100644
--- a/packages/cloud_firestore/cloud_firestore/android/src/main/java/io/flutter/plugins/firebase/firestore/FlutterFirebaseFirestoreMessageCodec.java
+++ b/packages/cloud_firestore/cloud_firestore/android/src/main/java/io/flutter/plugins/firebase/firestore/FlutterFirebaseFirestoreMessageCodec.java
@@ -74,7 +74,7 @@ protected void writeValue(ByteArrayOutputStream stream, Object value) {
       writeDouble(stream, ((GeoPoint) value).getLongitude());
     } else if (value instanceof VectorValue) {
       stream.write(DATA_TYPE_VECTOR_VALUE);
-      writeValue(stream, ((VectorValue) value).getInternalValue());
+      writeValue(stream, ((VectorValue) value).toArray());
     } else if (value instanceof DocumentReference) {
       stream.write(DATA_TYPE_DOCUMENT_REFERENCE);
       FirebaseFirestore firestore = ((DocumentReference) value).getFirestore();