diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index ed3a8a4f0724ba526ae90ac469fea955838b6cac..b8260921ceb377ab1580e8a650266fbcedfae2fb 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -5299,16 +5299,16 @@ qemuDomainDeviceDefValidateHostdev(const virDomainHostdevDef *hostdev,
         case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI_HOST:
             if (hostdev->info->bootIndex) {
                 virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                               _("booting from assigned devices is only "
-                                 "supported for PCI, USB and SCSI devices"));
+                               _("booting from assigned devices is not "
+                                 "supported by vhost SCSI devices"));
                 return -1;
             }
             break;
         case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
             if (hostdev->info->bootIndex) {
                 virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                               _("booting from assigned devices is only "
-                                 "supported for PCI, USB and SCSI devices"));
+                               _("booting from assigned devices is not "
+                                 "supported by mediated devices"));
                 return -1;
             }
             mdevsrc = &hostdev->source.subsys.u.mdev;