diff --git a/google/bigtable/admin/v2/bigtable_instance_admin.proto b/google/bigtable/admin/v2/bigtable_instance_admin.proto
index b0581b94..8e05bfd0 100644
--- a/google/bigtable/admin/v2/bigtable_instance_admin.proto
+++ b/google/bigtable/admin/v2/bigtable_instance_admin.proto
@@ -99,7 +99,7 @@ service BigtableInstanceAdmin {
     option (google.api.method_signature) = "instance,update_mask";
     option (google.longrunning.operation_info) = {
       response_type: "Instance"
-      metadata_type: "PartialUpdateInstanceMetadata"
+      metadata_type: "UpdateInstanceMetadata"
     };
   }