diff --git a/Example2/Chat.cs b/Example2/Chat.cs
index 99a39602..cff3f4ea 100644
--- a/Example2/Chat.cs
+++ b/Example2/Chat.cs
@@ -13,13 +13,13 @@ namespace Example2
     private string _prefix;
 
     public Chat ()
-      : this ("anon#")
+      : this (null)
     {
     }
 
     public Chat (string prefix)
     {
-      _prefix = prefix;
+      _prefix = prefix ?? "anon#";
     }
 
     private string getName ()
diff --git a/Example3/Chat.cs b/Example3/Chat.cs
index 0d49caca..ae8d7907 100644
--- a/Example3/Chat.cs
+++ b/Example3/Chat.cs
@@ -13,13 +13,13 @@ namespace Example3
     private string _prefix;
 
     public Chat ()
-      : this ("anon#")
+      : this (null)
     {
     }
 
     public Chat (string prefix)
     {
-      _prefix = prefix;
+      _prefix = prefix ?? "anon#";
     }
 
     private string getName ()
diff --git a/README.md b/README.md
index 93eff026..0432f3db 100644
--- a/README.md
+++ b/README.md
@@ -294,13 +294,13 @@ public class Chat : WebSocketService
   private string _suffix;
 
   public Chat ()
-    : this (String.Empty)
+    : this (null)
   {
   }
 
   public Chat (string suffix)
   {
-    _suffix = suffix;
+    _suffix = suffix ?? String.Empty;
   }
 
   protected override void OnMessage (MessageEventArgs e)