diff --git a/config/user-config.sample.js b/config/user-config.sample.js
index a61e2360e9cab9f564dd0cc25937f2ca7656d4e9..96161db8543af6c660d70001585e31bdab073015 100644
--- a/config/user-config.sample.js
+++ b/config/user-config.sample.js
@@ -306,7 +306,7 @@ const glueConfig = {
       },
     },
     dataProviderInterface: {
-      uploadFileTypes: '.txt, .docx, .doc, .pdf, .shp, .json, .xml, .geojson, .rdf, .xlsx, .xls',
+      uploadFileTypes: '.txt,.docx,.doc,.pdf,.shp,.json,.xml,.geojson,.rdf,.xlsx,.xls',
       useService: true,
       basePath: '/dpi',
       specification: 'dcatap',