diff -r 2354255a1844 -r e8438996d406 vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java
--- a/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Thu Oct 11 10:03:21 2012 -0700
+++ b/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Thu Oct 11 10:43:17 2012 -0700
@@ -886,7 +886,8 @@
         return i;
     }
     
-    private void addReference(String cn) {
+    private void addReference(String cn) throws IOException {
+        out.append(" /* needs ").append(cn).append(" */");
         if (references != null) {
             references.add(cn);
         }