diff -r 001389026dbf -r 42c2ceb1e160 vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java
--- a/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Tue Dec 04 11:21:10 2012 +0100
+++ b/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Tue Dec 04 12:06:27 2012 +0100
@@ -1158,7 +1158,7 @@
                 if (cnt++ > 0) {
                     out.append(",\n");
                 }
-                out.append(attr).append(attrType).append(" : ").append(value);
+                out.append(attr).append("__").append(attrType).append(" : ").append(value);
             }
         };
         ap.parse(data, cd);