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-rw-r--r--lib/PublicInbox/Sigfd.pm3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/PublicInbox/Sigfd.pm b/lib/PublicInbox/Sigfd.pm
index 3c1d3811..5656baeb 100644
--- a/lib/PublicInbox/Sigfd.pm
+++ b/lib/PublicInbox/Sigfd.pm
@@ -31,8 +31,9 @@ sub new {
                 $self->SUPER::new($io, EPOLLIN | EPOLLET);
         } else { # master main loop
                 $self->{sock} = $io;
-                $self;
         }
+        $self->{is_kq} = 1 if tied(*$io);
+        $self;
 }
 
 # PublicInbox::Daemon in master main loop (blocking)