diff --git a/datastore_server/source/java/ch/systemsx/cisd/etlserver/plugins/ExperimentBasedArchivingTask.java b/datastore_server/source/java/ch/systemsx/cisd/etlserver/plugins/ExperimentBasedArchivingTask.java
index e017b5c8dff1909ad633968165da61d251823b16..cbc331f626d14211ab594ba5288f11a6ea71ea6b 100644
--- a/datastore_server/source/java/ch/systemsx/cisd/etlserver/plugins/ExperimentBasedArchivingTask.java
+++ b/datastore_server/source/java/ch/systemsx/cisd/etlserver/plugins/ExperimentBasedArchivingTask.java
@@ -82,7 +82,7 @@ public class ExperimentBasedArchivingTask implements IDataStoreLockingMaintenanc
 
     static final String FREE_SPACE_PROVIDER_PREFIX = "free-space-provider.";
 
-    static final String DATA_SET_SIZE_PREFIX = "data-set-size-in-KB.";
+    static final String DATA_SET_SIZE_PREFIX = "estimated-data-set-size-in-KB.";
 
     static final String DEFAULT_DATA_SET_TYPE = "DEFAULT";