diff --git a/src/as/com/threerings/util/ObjectMarshaller.as b/src/as/com/threerings/util/ObjectMarshaller.as
index 86a663c0b..172548d73 100644
--- a/src/as/com/threerings/util/ObjectMarshaller.as
+++ b/src/as/com/threerings/util/ObjectMarshaller.as
@@ -166,7 +166,7 @@ public class ObjectMarshaller
             if (type == "number" || type == "string" || type == "boolean" ) {
                 return null; // kosher!
             }
-            if (-1 != VALID_CLASSES.indexOf(ClassUtil.getClass(value))) {
+            if (-1 != VALID_CLASSES.indexOf(ClassUtil.getClassName(value))) {
                 return null; // kosher
             }
             if (!Util.isPlainObject(value)) {
@@ -187,6 +187,8 @@ public class ObjectMarshaller
     }
 
     /** Non-simple classes that we allow, as long as they are not subclassed. */
-    protected static const VALID_CLASSES :Array = [ ByteArray, Point, Rectangle ];
+    protected static const VALID_CLASSES :Array = [
+        "flash.utils.ByteArray", "flash.geom.Point", "flash.geom.Rectangle"
+    ];
 }
 }