diff --git a/src/qemu/qemu_namespace.c b/src/qemu/qemu_namespace.c
index 833313d5a6..6e50ef5af4 100644
--- a/src/qemu/qemu_namespace.c
+++ b/src/qemu/qemu_namespace.c
@@ -777,7 +777,7 @@ qemuDomainUnshareNamespace(virQEMUDriverConfig *cfg,
     }
 
 #if defined(__linux__)
-    if (umount("/dev") < 0) {
+    if (umount2("/dev", MNT_DETACH) < 0) {
         virReportSystemError(errno, "%s", _("failed to umount devfs on /dev"));
         goto cleanup;
     }