diff --git a/build.xml b/build.xml
index cc279c8e7..207f98655 100644
--- a/build.xml
+++ b/build.xml
@@ -23,6 +23,7 @@
 	<target name = "runtests" depends = "test">
 		<junit printsummary = "yes">
 			<classpath>
+				<pathelement location = "lib/junit.jar"/>
 				<pathelement location = "${bin.dir}"/>
 			</classpath>
 			<test name = "org.test.zlibrary.model.TestAll"/>