diff --git a/src/qemu/qemu_passt.c b/src/qemu/qemu_passt.c
index f640a69c00..0f09bf3db8 100644
--- a/src/qemu/qemu_passt.c
+++ b/src/qemu/qemu_passt.c
@@ -141,23 +141,24 @@ qemuPasstStart(virDomainObj *vm,
     g_autofree char *passtSocketName = qemuPasstCreateSocketPath(vm, net);
     g_autoptr(virCommand) cmd = NULL;
     g_autofree char *pidfile = qemuPasstCreatePidFilename(vm, net);
-    g_autofree char *errbuf = NULL;
     char macaddr[VIR_MAC_STRING_BUFLEN];
     size_t i;
     pid_t pid = (pid_t) -1;
     int exitstatus = 0;
     int cmdret = 0;
+    VIR_AUTOCLOSE errfd = -1;
 
     cmd = virCommandNew(PASST);
 
     virCommandClearCaps(cmd);
-    virCommandSetErrorBuffer(cmd, &errbuf);
+    virCommandSetPidFile(cmd, pidfile);
+    virCommandSetErrorFD(cmd, &errfd);
+    virCommandDaemonize(cmd);
 
     virCommandAddArgList(cmd,
                          "--one-off",
                          "--socket", passtSocketName,
                          "--mac-addr", virMacAddrFormat(&net->mac, macaddr),
-                         "--pid", pidfile,
                          NULL);
 
     if (net->mtu) {
@@ -263,7 +264,7 @@ qemuPasstStart(virDomainObj *vm,
 
     if (cmdret < 0 || exitstatus != 0) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("Could not start 'passt': %s"), errbuf);
+                       _("Could not start 'passt'. exitstatus: %d"), exitstatus);
         goto error;
     }