diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/graph/Constants.java b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/graph/Constants.java
index 7c4d03c1e..41eb172de 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/graph/Constants.java
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/graph/Constants.java
@@ -27,4 +27,5 @@ public class Constants implements Serializable {
 
 	public static final String HARVESTED = "Harvested";
 	public static final String DEFAULT_TRUST = "0.9";
+    public static final String FUNDER_DS = "entityregistry::projects";
 }