diff --git a/perl/Comedi.pm b/perl/Comedi.pm
index 87e64b5..2a67a4a 100644
--- a/perl/Comedi.pm
+++ b/perl/Comedi.pm
@@ -1,3 +1,4 @@
+#!/usr/bin/perl -w
 # Copyright (c) 1999 Joseph E. Smith <jes@presto.med.upenn.edu>
 #
 # See the 'COPYRIGHT' section below for complete copyright information.