diff --git a/bindings/java/src/net/hyperic/sigar/test/TestInvoker.java b/bindings/java/src/net/hyperic/sigar/test/TestInvoker.java
index bece9ecf..e9c3b4b6 100644
--- a/bindings/java/src/net/hyperic/sigar/test/TestInvoker.java
+++ b/bindings/java/src/net/hyperic/sigar/test/TestInvoker.java
@@ -1,15 +1,13 @@
 package net.hyperic.sigar.test;
 
 import net.hyperic.sigar.Sigar;
+import net.hyperic.sigar.SigarLoader;
 import net.hyperic.sigar.SigarProxy;
 import net.hyperic.sigar.SigarProxyCache;
 import net.hyperic.sigar.jmx.SigarInvokerJMX;
 
 public class TestInvoker extends SigarTestCase {
 
-    private final static boolean IS_WIN32 =
-        System.getProperty("os.name").startsWith("Windows");
-
     private static final String[][] OK_QUERIES = {
         { "sigar:Type=Mem", "Free" },
         { "sigar:Type=Mem", "Total" },
@@ -50,7 +48,7 @@ public class TestInvoker extends SigarTestCase {
             String[] query = OK_QUERIES[i];
             SigarInvokerJMX invoker =
                 SigarInvokerJMX.getInstance(proxy, query[0]);
-            if (IS_WIN32 &&
+            if (SigarLoader.IS_WIN32 &&
                 invoker.getType().equals("LoadAverage"))
             {
                 /* XXX not implemented on win32