diff -r 274a5fd12285 -r bb03db248026 libpurple/protocols/msn/session.c
--- a/libpurple/protocols/msn/session.c	Thu May 22 21:11:53 2014 +0200
+++ b/libpurple/protocols/msn/session.c	Thu May 22 21:43:22 2014 +0200
@@ -200,7 +200,8 @@
 	PurpleIMConversation * im;
 
 	if ((im = msn_session_get_im(session,passport)) != NULL){
-		purple_conversation_write(PURPLE_CONVERSATION(im), NULL, msg, flags, time(NULL));
+		purple_conversation_write_system_message(
+			PURPLE_CONVERSATION(im), msg, flags);
 	}
 }