--- a/Implab.ServiceHost/Unity/DependencyParameterElement.cs	Thu Apr 26 19:35:01 2018 +0300
+++ b/Implab.ServiceHost/Unity/DependencyParameterElement.cs	Fri Apr 27 04:47:52 2018 +0300
@@ -1,12 +1,16 @@
 using System.Xml.Serialization;
 
 namespace Implab.ServiceHost.Unity {
-    public class DependencyParameterElement : InjectionParameterElement {
+    public class DependencyParameterElement : InjectionParameterElement, IDependencyReference {
 
         [XmlAttribute("name")]
         public string DependencyName { get; set; }
 
         [XmlAttribute("optional")]
         public bool Optional { get; set; }
+
+        internal override void Visit(InjectionValueBuilder builder) {
+            builder.Visit(this);
+        }
     }
 }
\ No newline at end of file