diff -r bf066a5ca2f7 -r eb35680d5094 rt/emul/mini/src/main/java/java/lang/Object.java
--- a/rt/emul/mini/src/main/java/java/lang/Object.java	Wed Feb 27 17:28:48 2013 +0100
+++ b/rt/emul/mini/src/main/java/java/lang/Object.java	Wed Feb 27 17:31:52 2013 +0100
@@ -51,7 +51,7 @@
         }
     }
     @JavaScriptBody(args = {}, body = "var p = vm.java_lang_Object(false);" +
-        "p.toString = Object.prototype.toString__Ljava_lang_String_2;"
+        "p.toString = function() { return this.toString__Ljava_lang_String_2(); };"
     )
     private static native void registerToString();
     static {