diff -r 78b4b4c6e6cb -r df5ed3731148 libpurple/protocols/irc/irc.c
--- a/libpurple/protocols/irc/irc.c	Fri Aug 23 15:07:48 2013 +0530
+++ b/libpurple/protocols/irc/irc.c	Tue Aug 27 04:18:00 2013 +0530
@@ -915,6 +915,13 @@
 		irc_cmd_ping(irc, NULL, NULL, NULL);
 }
 
+static gsize
+irc_get_max_message_size(PurpleConnection *gc)
+{
+	/* got from pidgin-otr */
+	return 417;
+}
+
 static PurplePluginProtocolInfo prpl_info =
 {
 	sizeof(PurplePluginProtocolInfo),    /* struct_size */
@@ -988,7 +995,8 @@
 	NULL,					 /* get_media_caps */
 	NULL,					 /* get_moods */
 	NULL,					 /* set_public_alias */
-	NULL					 /* get_public_alias */
+	NULL,					 /* get_public_alias */
+	irc_get_max_message_size		/* get_max_message_size */
 };
 
 static gboolean load_plugin (PurplePlugin *plugin) {