diff --git a/build.xml b/build.xml
index e9e4be8d..c2158205 100644
--- a/build.xml
+++ b/build.xml
@@ -169,6 +169,8 @@
     <copy todir="${gwtjar.dir}">
       <fileset dir="src/java" includes="com/samskivert/Utils.gwt.xml"/>
       <fileset dir="src/java" includes="com/samskivert/text/MessageUtil.java"/>
+      <fileset dir="src/java" includes="com/samskivert/util/ByteEnum.java"/>
+      <fileset dir="src/java" includes="com/samskivert/util/ByteEnumUtil.java"/>
     </copy>
     <jar basedir="${gwtjar.dir}" destfile="${deploy.dir}/${app.name}-gwt.jar"/>
     <delete dir="${gwtjar.dir}"/>