1 files changed, 4 insertions, 1 deletions
diff --git a/lib/PublicInbox/InboxIdle.pm b/lib/PublicInbox/InboxIdle.pm
index c19b8d18..d60d4f23 100644
--- a/lib/PublicInbox/InboxIdle.pm
+++ b/lib/PublicInbox/InboxIdle.pm
@@ -58,7 +58,10 @@ sub new {
                  my $sock = gensym;
                  tie *$sock, 'PublicInbox::In2Tie', $inot;
                  $inot->blocking(0);
-                $inot->on_overflow(undef); # broadcasts everything on overflow
+                if ($inot->can('on_overflow')) {
+                         # broadcasts everything on overflow
+                        $inot->on_overflow(undef);
+                }
                  $self->SUPER::new($sock, EPOLLIN | EPOLLET);
          } else {
                  require PublicInbox::FakeInotify;