diff --git a/rtd_yeastx/source/java/ch/systemsx/cisd/openbis/dss/yeastx/server/EICMLChromatogramGeneratorServlet.java b/rtd_yeastx/source/java/ch/systemsx/cisd/openbis/dss/yeastx/server/EICMLChromatogramGeneratorServlet.java
index c35661a1527af4f356ddb76fb19bc321a005624f..09f0d87c72fb1675c04326d38e08ff82878544cb 100644
--- a/rtd_yeastx/source/java/ch/systemsx/cisd/openbis/dss/yeastx/server/EICMLChromatogramGeneratorServlet.java
+++ b/rtd_yeastx/source/java/ch/systemsx/cisd/openbis/dss/yeastx/server/EICMLChromatogramGeneratorServlet.java
@@ -29,6 +29,7 @@ import javax.sql.DataSource;
 import ch.systemsx.cisd.common.exceptions.ConfigurationFailureException;
 import ch.systemsx.cisd.common.exceptions.UserFailureException;
 import ch.systemsx.cisd.openbis.dss.generic.server.AbstractDatasetDownloadServlet;
+import ch.systemsx.cisd.openbis.dss.generic.server.Utils;
 import ch.systemsx.cisd.openbis.dss.generic.shared.DataSourceProvider;
 import ch.systemsx.cisd.openbis.dss.generic.shared.ServiceProvider;
 import ch.systemsx.cisd.yeastx.db.DBUtils;
@@ -83,7 +84,7 @@ public class EICMLChromatogramGeneratorServlet extends AbstractDatasetDownloadSe
 
         public RequestParams(HttpServletRequest request)
         {
-            sessionId = getParam(request, SESSION_ID_PARAM);
+            sessionId = getParam(request, Utils.SESSION_ID_PARAM);
             datasetCode = getParam(request, DATASET_CODE_PARAM);
             chromatogramId = getLongParam(request, CHROMATOGRAM_CODE_PARAM);
             width = getIntParam(request, IMAGE_WIDTH_PARAM, DEFAULT_WIDTH);