diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 6c57ed2c6235396b444460ee7b0d7818bdb9a6ad..fd79390a7ae9be34ba52c28b583a25b9b2fe9e56 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -4341,6 +4341,8 @@ qemuDomainCheckRemoveOptionalDisk(virQEMUDriverPtr driver,
                                                    disk->info.alias,
                                                    VIR_DOMAIN_EVENT_DISK_CHANGE_MISSING_ON_START);
         ignore_value(virDomainDiskSetSource(disk, NULL));
+        /* keeping the old startup policy would be invalid for new images */
+        disk->startupPolicy = VIR_DOMAIN_STARTUP_POLICY_DEFAULT;
     } else {
         event = virDomainEventDiskChangeNewFromObj(vm, src, NULL,
                                                    disk->info.alias,