diff --git a/websocket-sharp/Net/HttpListenerRequest.cs b/websocket-sharp/Net/HttpListenerRequest.cs
index 60c62df2..8dc8651c 100644
--- a/websocket-sharp/Net/HttpListenerRequest.cs
+++ b/websocket-sharp/Net/HttpListenerRequest.cs
@@ -537,6 +537,13 @@ namespace WebSocketSharp.Net
     /// </value>
     public string[] UserLanguages {
       get {
+        var val = _headers["Accept-Language"];
+        if (val == null)
+          return null;
+
+        if (_userLanguages == null)
+          _userLanguages = val.Split (',');
+
         return _userLanguages;
       }
     }
@@ -571,11 +578,6 @@ namespace WebSocketSharp.Net
         return;
       }
 
-      if (lower == "accept-language") {
-        _userLanguages = val.Split (',');
-        return;
-      }
-
       if (lower == "content-length") {
         long len;
         if (!Int64.TryParse (val, out len)) {