diff --git a/clusterd/clusterd b/clusterd/clusterd
index d7dc9e5..765cdac 100755
--- a/clusterd/clusterd
+++ b/clusterd/clusterd
@@ -1204,7 +1204,7 @@ sub clp_rx_LSOF {
 		defined $pid or die "$!\n";
 		unless ($pid) {
 			$socket->blocking(1);
-			open P,'timeout -k 12s 10s lsof|' or die "$!\n";
+			open P,'timeout -k 12s 10s lsof -n|' or die "$!\n";
 			while (<P>) {
 				next if defined $pattern && index($_,$pattern)<0;
 				$socket->send(pack('n',length($_)).$_,0);