diff --git a/Sources/IO/XML/XMLPolyDataWriter/index.js b/Sources/IO/XML/XMLPolyDataWriter/index.js
index 8edcd7c50f2..dd4744dc704 100644
--- a/Sources/IO/XML/XMLPolyDataWriter/index.js
+++ b/Sources/IO/XML/XMLPolyDataWriter/index.js
@@ -50,6 +50,11 @@ function vtkXMLPolyDataWriter(publicAPI, model) {
       'CellData',
       dataObject.getCellData()
     );
+    publicAPI.processDataSetAttributes(
+      piece,
+      'FieldData',
+      dataObject.getFieldData()
+    );
     publicAPI.processDataArray(piece.ele('Points'), dataObject.getPoints());
 
     POLYDATA_FIELDS.forEach((cellType) => {