diff --git a/nashorn/make/build.xml b/nashorn/make/build.xml
index c647ba4b92247fd92d4b5a7d1ddc3ff1f521be0c..7c05e789fe940f0fa0dd12b6df9c9088b9cd647a 100644
--- a/nashorn/make/build.xml
+++ b/nashorn/make/build.xml
@@ -212,7 +212,9 @@
            target="${javac.target}"
            debug="${javac.debug}"
            encoding="${javac.encoding}"
-           includeantruntime="false"/>
+           includeantruntime="false">
+        <compilerarg line="-extdirs &quot;&quot;"/>
+    </javac>
 
     <!-- tests that check nashorn internals and internal API -->
     <jar jarfile="${nashorn.internal.tests.jar}">