diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/AbstractServer.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/AbstractServer.java
index df70852635d7859d896ebabf2c428d0398c8f8cd..bb41a7adb089984a5101b1ac2d76c903834a90dd 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/AbstractServer.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/AbstractServer.java
@@ -69,7 +69,7 @@ public abstract class AbstractServer<T extends IServer> extends AbstractServiceW
     private IDataSetTypeSlaveServerPlugin dataSetTypeSlaveServerPlugin;
 
     @Resource(name = ComponentNames.SESSION_MANAGER)
-    private ISessionManager<Session> sessionManager;
+    protected ISessionManager<Session> sessionManager;
 
     @Resource(name = ComponentNames.DAO_FACTORY)
     private IDAOFactory daoFactory;