diff --git a/dspace-api/src/main/java/org/dspace/content/edit/AssociateItemMode.java b/dspace-api/src/main/java/org/dspace/content/edit/AssociateItemMode.java
index 969cbaaf870..314407d1cb4 100644
--- a/dspace-api/src/main/java/org/dspace/content/edit/AssociateItemMode.java
+++ b/dspace-api/src/main/java/org/dspace/content/edit/AssociateItemMode.java
@@ -10,6 +10,7 @@
 import java.util.List;
 
 import org.dspace.content.logic.DefaultFilter;
+import org.dspace.content.logic.Filter;
 import org.dspace.content.security.AccessItemMode;
 import org.dspace.content.security.CrisSecurity;
 
@@ -137,6 +138,11 @@ public List<String> getGroups() {
         return groups;
     }
 
+    @Override
+    public Filter getAdditionalFilter() {
+        return null;
+    }
+
     @Override
     public String toString() {
         return "AssociateItemMode [name=" + name + ", label=" + label + ", security=" + securities + ", discovery="