diff --git a/build.xml b/build.xml
index 173235e3..1a68e727 100644
--- a/build.xml
+++ b/build.xml
@@ -13,7 +13,7 @@
 
     <target name="compile">
         <mkdir dir="${dir.classes}"/>
-        <javac srcdir="${dir.src}" destdir="${dir.classes}">
+        <javac srcdir="${dir.src}" destdir="${dir.classes}" debug="true">
     		<classpath>
     			<fileset dir="${dir.lib}">
     				<include name="*.jar"/>