1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/SwiftenDevelopersGuide/Examples/EchoBot/EchoBot4.cpp b/Documentation/SwiftenDevelopersGuide/Examples/EchoBot/EchoBot4.cpp
index 077e749..9b2277b 100644
--- a/Documentation/SwiftenDevelopersGuide/Examples/EchoBot/EchoBot4.cpp
+++ b/Documentation/SwiftenDevelopersGuide/Examples/EchoBot/EchoBot4.cpp
@@ -57,7 +57,7 @@ class EchoBot {
 			rosterRequest->send();
 		}
 
-		void handleRosterReceived(const optional<ErrorPayload>& error) {
+		void handleRosterReceived(ErrorPayload::ref error) {
 			if (error) {
 				std::cerr << "Error receiving roster. Continuing anyway.";
 			}