diff --git a/mozilla/webtools/graph/graph.cgi b/mozilla/webtools/graph/graph.cgi
index 8794d433f49..23ec518b078 100755
--- a/mozilla/webtools/graph/graph.cgi
+++ b/mozilla/webtools/graph/graph.cgi
@@ -1,4 +1,5 @@
 #!/usr/bin/perl
+# -*- Mode: perl; indent-tabs-mode: nil -*-
 use CGI::Carp qw(fatalsToBrowser);
 use CGI::Request;
 use Date::Calc qw(Add_Delta_Days);  # http://www.engelschall.com/u/sb/download/Date-Calc/
diff --git a/mozilla/webtools/graph/query.cgi b/mozilla/webtools/graph/query.cgi
index 2208661ec90..e0db441d43b 100755
--- a/mozilla/webtools/graph/query.cgi
+++ b/mozilla/webtools/graph/query.cgi
@@ -1,4 +1,5 @@
 #!/usr/bin/perl
+# -*- Mode: perl; indent-tabs-mode: nil -*-
 use CGI::Carp qw(fatalsToBrowser);
 use CGI::Request;
 use Date::Calc qw(Add_Delta_Days);  # http://www.engelschall.com/u/sb/download/Date-Calc/