diff --git a/configure.ac b/configure.ac
index 06aae912c..3efa9aba7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,8 +3,8 @@ dnl STATUS: "X" for prerelease beta builds,
 dnl         "Z" for unsupported trunk builds,
 dnl         "0" for stable, supported releases
 dnl these should be the only two lines you need to change
-m4_define([user_agent_prefix],[2.80])
-m4_define([peer_id_prefix],[-TR2800-])
+m4_define([user_agent_prefix],[2.80+])
+m4_define([peer_id_prefix],[-TR280Z-])
 
 AC_INIT([transmission],[user_agent_prefix],[http://trac.transmissionbt.com/newticket])
 AC_SUBST(USERAGENT_PREFIX,[user_agent_prefix])