diff --git a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/sx/bio/pubmed/PMAffiliation.java b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/sx/bio/pubmed/PMAffiliation.java
index a8dacd1323..e3dcc95dd0 100644
--- a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/sx/bio/pubmed/PMAffiliation.java
+++ b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/sx/bio/pubmed/PMAffiliation.java
@@ -31,8 +31,7 @@ public class PMAffiliation {
         return identifier;
     }
 
-    public PMAffiliation setIdentifier(PMIdentifier identifier) {
+    public void setIdentifier(PMIdentifier identifier) {
         this.identifier = identifier;
-        return this;
     }
 }