diff --git a/configure.ac b/configure.ac
index 7d0d6c60e..91439181f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
-AC_INIT([transmission],[1.20],[http://trac.transmissionbt.com/newticket])
-PEERID_PREFIX="-TR1200-"
-USERAGENT_PREFIX="1.20"
+AC_INIT([transmission],[1.20Z],[http://trac.transmissionbt.com/newticket])
+PEERID_PREFIX="-TR120Z-"
+USERAGENT_PREFIX="1.20+"
 AC_SUBST(PEERID_PREFIX,[$PEERID_PREFIX])
 AC_SUBST(USERAGENT_PREFIX,[$USERAGENT_PREFIX])
 
diff --git a/macosx/version.sh b/macosx/version.sh
index d38b83cf4..53064783a 100755
--- a/macosx/version.sh
+++ b/macosx/version.sh
@@ -7,8 +7,8 @@
 #         "Z" for unsupported trunk builds,
 #         "0" for stable, supported releases
 # these should be the only two lines you need to change
-PEERID_PREFIX="-TR1200-"
-USERAGENT_PREFIX="1.20"
+PEERID_PREFIX="-TR120Z-"
+USERAGENT_PREFIX="1.20+"
 
 
 SVN_REVISION=`find ./ -name "*\.[chmp]" -o -name "*\.cpp" -o -name "*\.po" -o -name "*\.sh" | \