diff -r afa337c971e0 -r 4c386387f6f3 libpurple/message.c
--- a/libpurple/message.c	Thu May 22 19:36:16 2014 +0200
+++ b/libpurple/message.c	Thu May 22 20:20:19 2014 +0200
@@ -142,6 +142,16 @@
 	return priv->msgtime;
 }
 
+void
+purple_message_set_flags(PurpleMessage *msg, PurpleMessageFlags flags)
+{
+	PurpleMessagePrivate *priv = PURPLE_MESSAGE_GET_PRIVATE(msg);
+
+	g_return_if_fail(priv != NULL);
+
+	priv->flags = flags;
+}
+
 PurpleMessageFlags
 purple_message_get_flags(PurpleMessage *msg)
 {