lib/PublicInbox/IPC.pm | 2 +-

diff --git a/lib/PublicInbox/IPC.pm b/lib/PublicInbox/IPC.pm
index 3e299448b334629fb6427e7df02976381ec19242..8376275e3c9501c52366b08b7eda7fe4024b5d49 100644
--- a/lib/PublicInbox/IPC.pm
+++ b/lib/PublicInbox/IPC.pm
@@ -247,7 +247,7 @@ 	my $args = ipc_thaw($buf) // die "thaw error on buffer of size: $n";
 	undef $buf;
 	my $sub = shift @$args;
 	eval { $self->$sub(@$args) };
-	warn "$$ $0 wq_worker: $@" if $@;
+	warn "$$ $0 wq_worker: $sub: $@" if $@;
 	delete @$self{0..($nfd-1)};
 	$n;
 }