diff --git a/build.xml b/build.xml
index 8e166b40f0d..c18e71c4903 100644
--- a/build.xml
+++ b/build.xml
@@ -134,7 +134,7 @@
     <target name="compiler">
         <taskdef name="jarjar" classname="com.tonicsystems.jarjar.JarJarTask" classpath="${basedir}/dependencies/jarjar.jar"/>
         <taskdef resource="proguard/ant/task.properties" classpath="${basedir}/dependencies/proguard.jar"/>
-        <taskdef resource="net/sf/antcontrib/antlib.xml" classpath="${basedir}/dependencies/ant-contrib.jar"/>
+        <taskdef resource="net/sf/antcontrib/antcontrib.properties" classpath="${basedir}/dependencies/ant-contrib.jar"/>
 
         <cleandir dir="${output}/classes/compiler"/>
         <javac destdir="${output}/classes/compiler" debug="true" debuglevel="lines,vars,source" includeAntRuntime="false">