diff --git a/mozilla/tools/tinderbox-configs/xulrunner/linux/tinder-config.pl b/mozilla/tools/tinderbox-configs/xulrunner/linux/tinder-config.pl
index e77e39c1a54..56dd2cce066 100644
--- a/mozilla/tools/tinderbox-configs/xulrunner/linux/tinder-config.pl
+++ b/mozilla/tools/tinderbox-configs/xulrunner/linux/tinder-config.pl
@@ -155,7 +155,7 @@ $moz_cvsroot   = ":ext:cltbld\@cvs.mozilla.org:/cvsroot";
 $ObjDir = 'obj-xulrunner';
 
 # Extra build name, if needed.
-$BuildNameExtra = 'release';
+$BuildNameExtra = 'Nightly';
 
 # User comment, eg. ip address for dhcp builds.
 # ex: $UserComment = "ip = 208.12.36.108";
diff --git a/mozilla/tools/tinderbox-configs/xulrunner/win32/tinder-config.pl b/mozilla/tools/tinderbox-configs/xulrunner/win32/tinder-config.pl
index b2a8ffd5e3a..d7a4e49cf27 100755
--- a/mozilla/tools/tinderbox-configs/xulrunner/win32/tinder-config.pl
+++ b/mozilla/tools/tinderbox-configs/xulrunner/win32/tinder-config.pl
@@ -147,7 +147,7 @@ $moz_cvsroot   = ":ext:cltbld\@cvs.mozilla.org:/cvsroot";
 $ObjDir = 'obj-xulrunner';
 
 # Extra build name, if needed.
-$BuildNameExtra = 'release';
+$BuildNameExtra = 'Nightly';
 
 # User comment, eg. ip address for dhcp builds.
 # ex: $UserComment = "ip = 208.12.36.108";