diff --git a/configure.ac b/configure.ac
index a3c964433..342fb9ad0 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],[1.83])
-m4_define([peer_id_prefix],[-TR1830-])
+m4_define([user_agent_prefix],[1.83+])
+m4_define([peer_id_prefix],[-TR183Z-])
 
 AC_INIT([transmission],
         [user_agent_prefix],