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-rw-r--r--lib/PublicInbox/Sigfd.pm1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/PublicInbox/Sigfd.pm b/lib/PublicInbox/Sigfd.pm
index 2d27f6a1..f500902e 100644
--- a/lib/PublicInbox/Sigfd.pm
+++ b/lib/PublicInbox/Sigfd.pm
@@ -15,6 +15,7 @@ sub new {
         my $self = fields::new($class);
         my %signo = map {;
                 my $cb = $sig->{$_};
+                # SIGWINCH is 28 on FreeBSD, NetBSD, OpenBSD
                 my $num = ($_ eq 'WINCH' && $^O =~ /linux|bsd/i) ? 28 : do {
                         my $m = "SIG$_";
                         POSIX->$m;