diff --git a/dhp-workflows/dhp-doiboost/src/main/scala/eu/dnetlib/doiboost/SparkGenerateDoiBoost.scala b/dhp-workflows/dhp-doiboost/src/main/scala/eu/dnetlib/doiboost/SparkGenerateDoiBoost.scala
index bc26e44d6..fbe42ef7c 100644
--- a/dhp-workflows/dhp-doiboost/src/main/scala/eu/dnetlib/doiboost/SparkGenerateDoiBoost.scala
+++ b/dhp-workflows/dhp-doiboost/src/main/scala/eu/dnetlib/doiboost/SparkGenerateDoiBoost.scala
@@ -208,7 +208,7 @@ object SparkGenerateDoiBoost {
 
       )
       .filter(s => s!= null && s._2!=null)
-      .map(s => s._2)
+      .map(s => s._2._2)
       .write
       .mode(SaveMode.Overwrite)
       .save(s"$workingDirPath/doiBoostPublicationFiltered")