diff --git a/Src/Newtonsoft.Json/Utilities/LateBoundDelegateFactory.cs b/Src/Newtonsoft.Json/Utilities/LateBoundDelegateFactory.cs
index d3d1dc12..e4601148 100644
--- a/Src/Newtonsoft.Json/Utilities/LateBoundDelegateFactory.cs
+++ b/Src/Newtonsoft.Json/Utilities/LateBoundDelegateFactory.cs
@@ -183,18 +183,24 @@ namespace Newtonsoft.Json.Utilities
       generator.Emit(OpCodes.Ldarg_0);
       if (type.IsValueType)
         generator.Emit(OpCodes.Unbox, type);
+      else
+        generator.Emit(OpCodes.Castclass, type);
     }
 
     static void BoxIfNeeded(this ILGenerator generator, Type type)
     {
       if (type.IsValueType)
         generator.Emit(OpCodes.Box, type);
+      else
+        generator.Emit(OpCodes.Castclass, type);
     }
 
     static void UnboxIfNeeded(this ILGenerator generator, Type type)
     {
       if (type.IsValueType)
         generator.Emit(OpCodes.Unbox_Any, type);
+      else
+        generator.Emit(OpCodes.Castclass, type);
     }
 
     public static Func<T, object> CreateGet<T>(FieldInfo fieldInfo)