diff -r ff4983098f3f -r e80693152d8b rt/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java
--- a/rt/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Mon Dec 22 20:33:44 2014 +0100
+++ b/rt/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Tue Jan 20 12:26:35 2015 +0100
@@ -1398,6 +1398,7 @@
                                      "_" + fi[1], fi)
                     );
                     i += 2;
+                    addReference(fi[0]);
                     break;
                 }
                 case opc_putfield: {
@@ -1412,6 +1413,7 @@
                          accessField(mangleClassAccess + "(false)",
                                      "_" + fi[1], fi));
                     i += 2;
+                    addReference(fi[0]);
                     break;
                 }
                 case opc_getstatic: {