diff --git a/build.xml b/build.xml
index ae5777979..a6f21c1be 100644
--- a/build.xml
+++ b/build.xml
@@ -245,6 +245,9 @@
       <exclude name="${optional.package}/sound/*.java" unless="jmf.present" />
     </javac>
 
+    <copy file="${build.src}/${ant.package}/defaultManifest.mf"
+          todir="${build.classes}/${ant.package}" />
+
   </target>
 
   <!--