diff --git a/xenvm/lvs.ml b/xenvm/lvs.ml
index 023893c..8de7806 100644
--- a/xenvm/lvs.ml
+++ b/xenvm/lvs.ml
@@ -72,7 +72,7 @@ let lvs copts noheadings nosuffix units fields offline physical_device (vg_name,
     let inner l = Lwt_list.fold_left_s (fun acc s -> s >>= fun s -> Lwt.return (s::acc)) [] l >>= fun l -> Lwt.return (List.rev l) in
     inner (List.map inner rows) >>= fun rows ->
     let lines = print_table noheadings (" "::headings) (List.map (fun r -> " "::r) rows) in
-    Lwt_list.iter_s (fun x -> stdout "%s" x) lines
+    Lwt_list.iter_s (fun x -> stdout ~do_syslog:(not segs) "%s" x) lines
   )
 
 let lvs_cmd =
diff --git a/xenvm/xenvm_common.ml b/xenvm/xenvm_common.ml
index aa80fc3..b4267b3 100644
--- a/xenvm/xenvm_common.ml
+++ b/xenvm/xenvm_common.ml
@@ -7,9 +7,11 @@ let dm = ref (module Retrymapper.Make(Devmapper.Linux) : S.RETRYMAPPER)
 
 let syslog = Lwt_log.syslog ~facility:`Daemon ()
 
-let stdout fmt = Printf.ksprintf (fun s ->
-  Printf.printf "%s\n%!" s;
-  Lwt_log.log ~logger:syslog ~level:Lwt_log.Notice ("stdout:" ^ s)
+let stdout ?(do_syslog=true) fmt = Printf.ksprintf (fun s ->
+    Printf.printf "%s\n%!" s;
+    if do_syslog
+    then Lwt_log.log ~logger:syslog ~level:Lwt_log.Notice ("stdout:" ^ s)
+    else Lwt.return ()
 ) fmt
 let stderr fmt = Printf.ksprintf (fun s ->
   Printf.fprintf stderr "%s\n%!" s;