diff --git a/src/Microsoft.AspNetCore.Http.Abstractions/StatusCodes.cs b/src/Microsoft.AspNetCore.Http.Abstractions/StatusCodes.cs
index 0d169b1982..bcc8487826 100644
--- a/src/Microsoft.AspNetCore.Http.Abstractions/StatusCodes.cs
+++ b/src/Microsoft.AspNetCore.Http.Abstractions/StatusCodes.cs
@@ -5,6 +5,8 @@ namespace Microsoft.AspNetCore.Http
 {
     public static class StatusCodes
     {
+        public const int Status101SwitchingProtocols = 101;
+
         public const int Status200OK = 200;
         public const int Status201Created = 201;
         public const int Status202Accepted = 202;
diff --git a/src/Microsoft.AspNetCore.WebUtilities/ReasonPhrases.cs b/src/Microsoft.AspNetCore.WebUtilities/ReasonPhrases.cs
index 07d5b4212f..eb6aa120e7 100644
--- a/src/Microsoft.AspNetCore.WebUtilities/ReasonPhrases.cs
+++ b/src/Microsoft.AspNetCore.WebUtilities/ReasonPhrases.cs
@@ -9,6 +9,8 @@ namespace Microsoft.AspNetCore.WebUtilities
     {
         private static IDictionary<int, string> Phrases = new Dictionary<int, string>()
         {
+            { 101, "Switching Protocols" },
+
             { 200, "OK" },
             { 201, "Created" },
             { 202, "Accepted" },