diff --git a/src/Markup/Perspex.Markup.Xaml/Context/PerspexParserFactory.cs b/src/Markup/Perspex.Markup.Xaml/Context/PerspexParserFactory.cs
index eda8435549..40dfb1d636 100644
--- a/src/Markup/Perspex.Markup.Xaml/Context/PerspexParserFactory.cs
+++ b/src/Markup/Perspex.Markup.Xaml/Context/PerspexParserFactory.cs
@@ -43,7 +43,7 @@ namespace Perspex.Markup.Xaml.Context
 
         private IObjectAssembler GetObjectAssemblerForUndefinedRoot()
         {
-            return new ObjectAssembler(_wiringContext, new TopDownValueContext());
+            return new PerspexObjectAssembler(_wiringContext);
         }
 
         public IXamlParser CreateForReadingSpecificInstance(object rootInstance)