Index: trunk/build.xml
===================================================================
--- trunk/build.xml	(revision 12228)
+++ trunk/build.xml	(revision 12229)
@@ -145,5 +145,5 @@
                 <!-- Java 9 stuff. Entries are safely ignored by Java 8 -->
                 <attribute name="Add-Exports" value="java.base/sun.security.util java.base/sun.security.x509" />
-                <attribute name="Add-Opens" value="java.desktop/javax.swing.text.html java.base/java.util.prefs" />
+                <attribute name="Add-Opens" value="java.desktop/javax.swing.text.html java.prefs/java.util.prefs" />
             </manifest>
             <zipfileset dir="images" prefix="images"/>