diff --git a/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/generic/shared/dto/DataSetInformation.java b/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/generic/shared/dto/DataSetInformation.java
index 8a8e67fbe6942932f0b6e63d40045ca2beb65324..1aefe944e759d244d2f333c799fa9bf4bf717554 100644
--- a/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/generic/shared/dto/DataSetInformation.java
+++ b/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/generic/shared/dto/DataSetInformation.java
@@ -352,7 +352,13 @@ public class DataSetInformation implements Serializable
             appendNameAndObject(buffer, "User", userID == null ? userEMail : userID);
         }
         appendNameAndObject(buffer, "Data Set Code", getDataSetCode());
-        appendNameAndObject(buffer, "Data Set Type", getDataSetType().getCode());
+        if (null != getDataSetType())
+        {
+            appendNameAndObject(buffer, "Data Set Type", getDataSetType().getCode());
+        } else
+        {
+            appendNameAndObject(buffer, "Data Set Type", "null");
+        }
         appendNameAndObject(buffer, "Experiment Identifier", getExperimentIdentifier());
         appendNameAndObject(buffer, "Sample Identifier", getSampleIdentifier());
         appendNameAndObject(buffer, "Producer Code", getProducerCode());