diff --git a/build.xml b/build.xml
index 1b42c8fde..13c06a18d 100644
--- a/build.xml
+++ b/build.xml
@@ -679,6 +679,8 @@
                unless="xalan.present"/>
       <exclude name="org/apache/tools/ant/taskdefs/optional/AdaptxLiaisonTest.java" 
                unless="adaptx.present"/>
+      <exclude name="${optional.package}/TraXLiaisonTest.java" 
+               unless="trax.present"/>
     </javac>
   </target>