diff --git a/build.xml b/build.xml
index 8d48995..59a5f34 100644
--- a/build.xml
+++ b/build.xml
@@ -6,7 +6,7 @@
 
   <target name="compile">
     <mkdir dir="build/classes" />
-    <javac srcdir="src" destdir="build/classes" includeantruntime="false">
+    <javac srcdir="src" destdir="build/classes" includeantruntime="false" debug="true">
       <compilerarg value="-Xlint" />
       <classpath>
         <fileset dir="lib" includes="*.jar" />