1 files changed, 4 insertions, 2 deletions
diff --git a/src/DotNetOpenAuth.OAuth2.AuthorizationServer/OAuth2/ChannelElements/AuthServerBindingElementBase.cs b/src/DotNetOpenAuth.OAuth2.AuthorizationServer/OAuth2/ChannelElements/AuthServerBindingElementBase.cs
index 9d3a52c..d824663 100644
--- a/src/DotNetOpenAuth.OAuth2.AuthorizationServer/OAuth2/ChannelElements/AuthServerBindingElementBase.cs
+++ b/src/DotNetOpenAuth.OAuth2.AuthorizationServer/OAuth2/ChannelElements/AuthServerBindingElementBase.cs
@@ -9,6 +9,8 @@ namespace DotNetOpenAuth.OAuth2.ChannelElements {
 	using System.Collections.Generic;
 	using System.Linq;
 	using System.Text;
+	using System.Threading;
+	using System.Threading.Tasks;
 	using Messaging;
 
 	/// <summary>
@@ -64,7 +66,7 @@ namespace DotNetOpenAuth.OAuth2.ChannelElements {
 		/// Implementations that provide message protection must honor the
 		/// <see cref="MessagePartAttribute.RequiredProtection"/> properties where applicable.
 		/// </remarks>
-		public abstract MessageProtections? ProcessOutgoingMessage(IProtocolMessage message);
+		public abstract Task<MessageProtections?> ProcessOutgoingMessageAsync(IProtocolMessage message, CancellationToken cancellationToken);
 
 		/// <summary>
 		/// Performs any transformation on an incoming message that may be necessary and/or
@@ -83,6 +85,6 @@ namespace DotNetOpenAuth.OAuth2.ChannelElements {
 		/// Implementations that provide message protection must honor the
 		/// <see cref="MessagePartAttribute.RequiredProtection"/> properties where applicable.
 		/// </remarks>
-		public abstract MessageProtections? ProcessIncomingMessage(IProtocolMessage message);
+		public abstract Task<MessageProtections?> ProcessIncomingMessageAsync(IProtocolMessage message, CancellationToken cancellationToken);
 	}
 }