diff -r 2eb147600041 -r 4461d5c1e61c libpurple/protocols/yahoo/libymsg.c
--- a/libpurple/protocols/yahoo/libymsg.c	Fri Aug 23 11:32:53 2013 +0200
+++ b/libpurple/protocols/yahoo/libymsg.c	Mon Aug 26 17:21:22 2013 +0200
@@ -5134,3 +5134,9 @@
 	return list;
 }
 
+gsize
+yahoo_get_max_message_size(PurpleConnection *gc)
+{
+	/* got from pidgin-otr */
+	return 799;
+}