diff --git a/core/src/main/scala/no/nrk/bigquery/internal/UdfUpdateOperation.scala b/core/src/main/scala/no/nrk/bigquery/internal/UdfUpdateOperation.scala
index 07ca35e4..b6647f6b 100644
--- a/core/src/main/scala/no/nrk/bigquery/internal/UdfUpdateOperation.scala
+++ b/core/src/main/scala/no/nrk/bigquery/internal/UdfUpdateOperation.scala
@@ -80,6 +80,7 @@ object UdfUpdateOperation {
       if (bqType.tpe == StandardSQLTypeName.STRUCT)
         StandardSQLDataType
           .newBuilder()
+          .setTypeKind(StandardSQLTypeName.STRUCT.name)
           .setStructType(
             StandardSQLStructType
               .newBuilder()