diff --git a/tools/c2man.pl b/tools/c2man.pl
index 22e1ee24d5..3c78b9b581 100755
--- a/tools/c2man.pl
+++ b/tools/c2man.pl
@@ -27,6 +27,7 @@
 #  Should we have a special output mode for WineHQ?
 
 use strict;
+use bytes;
 
 # Options
 my $opt_output_directory = "man3w"; # All default options are for nroff (man pages)