diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/public/resources/api/v3/as/dto/experiment/update/ExperimentUpdate.js b/openbis/source/java/ch/systemsx/cisd/openbis/public/resources/api/v3/as/dto/experiment/update/ExperimentUpdate.js
index 8b91198748176aa232357333b7a056a1cb9e8dea..174292cf80efabd56c23573d4856e1f6325e1cd7 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/public/resources/api/v3/as/dto/experiment/update/ExperimentUpdate.js
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/public/resources/api/v3/as/dto/experiment/update/ExperimentUpdate.js
@@ -18,6 +18,7 @@ define([ "stjs", "as/dto/common/update/FieldUpdateValue", "as/dto/common/update/
 		prototype.freezeForDataSets = null;
 		prototype.freezeForSamples = null;
 		prototype.properties = null;
+		prototype.sampleProperties = null;
 		prototype.projectId = null;
 		prototype.tagIds = null;
 		prototype.attachments = null;