diff --git a/Tools/Source/SurfaceArea/build.xml b/Tools/Source/SurfaceArea/build.xml
index 62378864bc..66a811a2ac 100644
--- a/Tools/Source/SurfaceArea/build.xml
+++ b/Tools/Source/SurfaceArea/build.xml
@@ -66,7 +66,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
   
   <target name="SurfaceArea" depends="init" unless="jar.newer">
     <antcall target="SurfaceArea.java.clean"/>
-    <java classname="org.apache.xmlbeans.impl.tool.SchemaCompiler">
+    <java classname="org.apache.xmlbeans.impl.tool.SchemaCompiler" fork="true">
       <classpath refid="classpath"/>
       <arg value="-javasource"/>
       <arg value="1.5"/>