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 704974268..c0e86751d 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
@@ -27,5 +27,6 @@ public class Constants implements Serializable {
 
 	public static final String HARVESTED = "Harvested";
 	public static final String DEFAULT_TRUST = "0.9";
+	public static final String USER_CLAIM = "Linked by user";
 	// public static final String FUNDER_DS = "entityregistry::projects";
 }