diff --git a/jetty-osgi/test-jetty-osgi/src/test/config/etc/jetty.xml b/jetty-osgi/test-jetty-osgi/src/test/config/etc/jetty.xml
index f0c33565010..25f831c57c5 100644
--- a/jetty-osgi/test-jetty-osgi/src/test/config/etc/jetty.xml
+++ b/jetty-osgi/test-jetty-osgi/src/test/config/etc/jetty.xml
@@ -70,7 +70,7 @@
     <Call class="org.eclipse.jetty.webapp.Configurations" name="setServerDefault">
       <Arg><Ref refid="Server"/></Arg>
       <Call name="add">
-        <Arg>
+        <Arg name="configClass">
           <Array type="String">
             <Item>org.eclipse.jetty.webapp.FragmentConfiguration</Item>
             <Item>org.eclipse.jetty.webapp.JettyWebXmlConfiguration</Item>