--- a/libpurple/protocols/jabber/caps.c Fri Jun 02 15:17:12 2017 -0500 +++ b/libpurple/protocols/jabber/caps.c Fri Jun 02 15:19:48 2017 -0500 @@ -826,7 +826,7 @@ g_free(tmp); } - g_checksum_update(hash, (const guchar *)"<", 1); + g_checksum_update(hash, (const guchar *)"<", -1); } gchar *jabber_caps_calculate_hash(JabberCapsClientInfo *info,