diff --git a/src/Hosting/Abstractions/src/IApplicationLifetime.cs b/src/Hosting/Abstractions/src/IApplicationLifetime.cs
index bdba9b904f..38f3eb43c4 100644
--- a/src/Hosting/Abstractions/src/IApplicationLifetime.cs
+++ b/src/Hosting/Abstractions/src/IApplicationLifetime.cs
@@ -7,8 +7,12 @@ namespace Microsoft.AspNetCore.Hosting
 {
     /// <summary>
     /// Allows consumers to perform cleanup during a graceful shutdown.
+    /// <para>
+    ///  This type is obsolete and will be removed in a future version.
+    ///  The recommended alternative is Microsoft.Extensions.Hosting.IHostApplicationLifetime.
+    /// </para>
     /// </summary>
-    [System.Obsolete("Use Microsoft.Extensions.Hosting.IHostApplicationLifetime instead.", error: false)]
+    [System.Obsolete("This type is obsolete and will be removed in a future version. The recommended alternative is Microsoft.Extensions.Hosting.IHostApplicationLifetime.", error: false)]
     public interface IApplicationLifetime
     {
         /// <summary>
diff --git a/src/Hosting/Abstractions/src/IHostingEnvironment.cs b/src/Hosting/Abstractions/src/IHostingEnvironment.cs
index 864c52c7b6..18133a7f7e 100644
--- a/src/Hosting/Abstractions/src/IHostingEnvironment.cs
+++ b/src/Hosting/Abstractions/src/IHostingEnvironment.cs
@@ -7,8 +7,12 @@ namespace Microsoft.AspNetCore.Hosting
 {
     /// <summary>
     /// Provides information about the web hosting environment an application is running in.
+    /// <para>
+    ///  This type is obsolete and will be removed in a future version.
+    ///  The recommended alternative is Microsoft.AspNetCore.Hosting.IWebHostEnvironment.
+    /// </para>
     /// </summary>
-    [System.Obsolete("Use IWebHostEnvironment instead.", error: false)]
+    [System.Obsolete("This type is obsolete and will be removed in a future version. The recommended alternative is Microsoft.AspNetCore.Hosting.IWebHostEnvironment.", error: false)]
     public interface IHostingEnvironment
     {
         /// <summary>