diff --git a/mozilla/config/fast-update.pl b/mozilla/config/fast-update.pl
index 566a96ff4da..e212f80ae7a 100755
--- a/mozilla/config/fast-update.pl
+++ b/mozilla/config/fast-update.pl
@@ -46,7 +46,7 @@ if (!$hours) {
 # if there is no such file, this will all just fail, which is ok
 open REPOSITORY, "<CVS/Repository";
 $rootdir = <REPOSITORY>;
-chop $rootdir;
+$rootdir =~ tr/\r\n//d; # Remove newlines
 close REPOSITORY;
 
 # try to guess the current branch by looking at all the