diff --git a/build.xml b/build.xml
index 63f5a891..242940ae 100644
--- a/build.xml
+++ b/build.xml
@@ -83,9 +83,9 @@
         <!-- java compiler properties -->
         <property name="javac.source" value="1.6" />
         <property name="javac.target" value="1.6" />
-        <condition property="bootclasspath.dir" value="${env.JRE_DIR}/lib"
+        <condition property="bootclasspath.dir" value="${env.JAVA_HOME}/jre/lib"
                            else="C:\Program Files (x86)\Java\jdk1.6.0_45\jre\lib">
-                    <isset property="env.JRE_DIR" />
+                    <isset property="env.JAVA_HOME" />
         </condition>
         <property name="debug" value="off" />
         <property name="deprecation" value="on" />