diff --git a/build.xml b/build.xml
index f994fe1d65c9e5a3e26779b9e3f42ac02d444da0..5ce80c604fc57ebc5db794b1a1c1e5d4b6d87d45 100644
--- a/build.xml
+++ b/build.xml
@@ -48,6 +48,9 @@
     <property name="libdir"  value="lib" />
     <property name="classpath"  value="classes"/>
     <property name="tempdir"  value="/tmp"/>
+    <!-- for downgrading -->
+    <!--property name="ant.build.javac.source"  value="1.7"/>
+    <property name="ant.build.javac.target"  value="1.7"/-->
     <!-- when using logback -->
     <property name="logback.configurationFile"  value="logback.xml"/>
   </target>