diff --git a/common/source/java/ch/systemsx/cisd/common/spring/WhiteListHttpInvokerServiceExporter.java b/common/source/java/ch/systemsx/cisd/common/spring/WhiteListHttpInvokerServiceExporter.java
index 93cc26dbd82855410a818aa8285a5bed742bc5ce..7d1eb78c809365d936071718e33cb1202fa58f45 100644
--- a/common/source/java/ch/systemsx/cisd/common/spring/WhiteListHttpInvokerServiceExporter.java
+++ b/common/source/java/ch/systemsx/cisd/common/spring/WhiteListHttpInvokerServiceExporter.java
@@ -27,7 +27,7 @@ import org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter;
  *
  * @author Franz-Josef Elmer
  */
-public abstract class WhiteListHttpInvokerServiceExporter extends HttpInvokerServiceExporter
+public class WhiteListHttpInvokerServiceExporter extends HttpInvokerServiceExporter
 {
     @Override
     protected ObjectInputStream createObjectInputStream(InputStream is) throws IOException