diff --git a/OrganizationLoader/Program.cs b/OrganizationLoader/Program.cs
index 2ec8968215bedc402aaf69a1def87463b16a8ad5..96be80a1ee41aa513b23e26a9a477f6736d7849b 100644
--- a/OrganizationLoader/Program.cs
+++ b/OrganizationLoader/Program.cs
@@ -299,7 +299,8 @@ namespace Coscine.OrganizationLoader
                 {
                     streamWriter.WriteLine($"<{rorId}#{organization.OrgId}>");
                     streamWriter.WriteLine($"   rdfs:label \"{organization.Name}\" ;");
-                    streamWriter.WriteLine($"   org:identifier \"{organization.OrgId}\" ;");
+                    streamWriter.WriteLine($"   org:identifier \"org-id:{organization.OrgId}\" ;");
+                    streamWriter.WriteLine($"   org:identifier \"ikz:{organization.IKZ}\" ;");
                     streamWriter.WriteLine($"   a org:OrganizationalUnit ;");
                     streamWriter.WriteLine(".");
                 }