diff --git a/webgis/js/gis.js b/webgis/js/gis.js
index 52b6d05..6320a0e 100644
--- a/webgis/js/gis.js
+++ b/webgis/js/gis.js
@@ -562,7 +562,7 @@ GIS.featurePopup = function (layerName, feature) {
             <tr><th>Località</th><td>${capitalize(feature.properties.LOCALITA) ?? 'n.d.'}</td></tr>
             <tr><th>Proprietà</th><td>${capitalize(feature.properties.PROPRIETA) ?? 'n.d.'}</td></tr>
             <tr><th>Foglio</th><td>${feature.properties.FOGLIO}</td></tr>
-            <tr><th>Particella</th><td>${feature.properties.PART_BIS}</td></tr>
+            <tr><th>Particella</th><td>${feature.properties.PART_BIS ?? 'n.d.'}</td></tr>
         </table>
     `;
     const content = {