diff --git a/mozilla/tools/tinderbox/build-seamonkey-util.pl b/mozilla/tools/tinderbox/build-seamonkey-util.pl
index 6e0f39d4058..2a5bd85c507 100644
--- a/mozilla/tools/tinderbox/build-seamonkey-util.pl
+++ b/mozilla/tools/tinderbox/build-seamonkey-util.pl
@@ -23,7 +23,7 @@ use Config;         # for $Config{sig_name} and $Config{sig_num}
 use File::Find ();
 use File::Copy;
 
-$::UtilsVersion = '$Revision: 1.233 $ ';
+$::UtilsVersion = '$Revision: 1.234 $ ';
 
 package TinderUtils;
 
@@ -37,6 +37,21 @@ require "post-mozilla.pl" if -e "post-mozilla.pl";
 #
 require "gettime.pl";
 
+#
+# For performance tests, we need the following perl modules installed:
+# (MacOSX, Linux, Win2k):
+#
+# Time::HiRes      for higher timer resolution
+# Bundle::LWP      for http (to report data to graph)
+#
+# The "CPAN" way of installing this is to start here:
+#   % perl -MCPAN -e shell
+#   <take defaults..>
+#   cpan> install Time::HiRes
+#   [...]
+#   cpan> install Bundle::LWP
+#
+
 sub Setup {
     InitVars();
     my $args = ParseArgs();