diff --git a/tools/cooja/build.xml b/tools/cooja/build.xml
index 96bdf532d..3ad01fb00 100644
--- a/tools/cooja/build.xml
+++ b/tools/cooja/build.xml
@@ -108,6 +108,20 @@ The COOJA Simulator
     </java>
   </target>
 
+  <target name="run64" depends="init, compile, jar, copy configs">
+    <java fork="yes" dir="${build}" classname="se.sics.cooja.GUI" maxmemory="512m">
+      <sysproperty key="user.language" value="en"/>
+      <jvmarg value="-d64 -XX:+ShowMessageBoxOnError"/>
+      <arg line="${args}"/>
+      <env key="LD_LIBRARY_PATH" value="."/>
+      <classpath>
+        <pathelement path="${build}"/>
+        <pathelement location="lib/jdom.jar"/>
+        <pathelement location="lib/log4j.jar"/>
+      </classpath>
+    </java>
+  </target>
+
   <target name="run_errorbox" depends="init, compile, jar, copy configs">
     <java fork="yes" dir="${build}" classname="se.sics.cooja.GUI" maxmemory="512m">
       <sysproperty key="user.language" value="en"/>