1 files changed, 2 insertions, 2 deletions
diff --git a/Firestore/core/src/firebase/firestore/remote/serializer.cc b/Firestore/core/src/firebase/firestore/remote/serializer.cc
index 7aec38b..0a1c168 100644
--- a/Firestore/core/src/firebase/firestore/remote/serializer.cc
+++ b/Firestore/core/src/firebase/firestore/remote/serializer.cc
@@ -281,8 +281,8 @@ void EncodeObject(Writer* writer, const ObjectValue& object_value) {
   return writer->WriteNestedMessage([&object_value](Writer* writer) {
     // Write each FieldsEntry (i.e. key-value pair.)
     for (const auto& kv : object_value.internal_value) {
-      writer->WriteTag({PB_WT_STRING,
-                        google_firestore_v1beta1_MapValue_FieldsEntry_key_tag});
+      writer->WriteTag(
+          {PB_WT_STRING, google_firestore_v1beta1_MapValue_fields_tag});
       writer->WriteNestedMessage(
           [&kv](Writer* writer) { return EncodeFieldsEntry(writer, kv); });
     }