diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/dto/AttachmentPE.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/dto/AttachmentPE.java
index fe2d81c2d78a802c68534ebf98874eea7e796cc5..3283c1c14961eb70eb7645844b3eaf95ae568fb6 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/dto/AttachmentPE.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/dto/AttachmentPE.java
@@ -156,6 +156,7 @@ public class AttachmentPE extends HibernateAbstractRegistrationHolder implements
             return false;
         }
 
+        @SuppressWarnings("unused")
         private void indexFileContent(Document document, LuceneOptions luceneOptions,
                 AttachmentPE attachment, String attachmentName)
         {