diff --git a/PocketSharp/Models/PocketAction.cs b/PocketSharp/Models/PocketAction.cs
index 3ab90f4..b6f83d4 100644
--- a/PocketSharp/Models/PocketAction.cs
+++ b/PocketSharp/Models/PocketAction.cs
@@ -46,6 +46,15 @@ namespace PocketSharp.Models
     [DataMember(Name = "title")]
     public string Title { get; set; }
 
+    /// <summary>
+    /// Gets or sets the associated Tweet ID.
+    /// </summary>
+    /// <value>
+    /// The Tweet ID.
+    /// </value>
+    [DataMember(Name = "ref_id")]
+    public string TweetID { get; set; }
+
     /// <summary>
     /// Gets or sets the time.
     /// </summary>
@@ -107,6 +116,8 @@ namespace PocketSharp.Models
         parameters.Add("new_tag", NewTag);
       if (Title != null)
         parameters.Add("title", Title);
+      if (TweetID != null)
+        parameters.Add("ref_id", TweetID);
       if (Uri != null)
         parameters.Add("uri", Uri.ToString());