diff -r 002b7c3d5157 -r eea0065bcc1a emul/src/main/java/java/lang/Class.java
--- a/emul/src/main/java/java/lang/Class.java	Wed Dec 19 16:43:37 2012 +0100
+++ b/emul/src/main/java/java/lang/Class.java	Thu Dec 20 08:59:47 2012 +0100
@@ -287,7 +287,12 @@
      * @return  {@code true} if this object represents an interface;
      *          {@code false} otherwise.
      */
-    public native boolean isInterface();
+    public boolean isInterface() {
+        return (getAccess() & 0x200) != 0;
+    }
+    
+    @JavaScriptBody(args = "self", body = "return self.access;")
+    private native int getAccess();
 
 
     /**