diff --git a/block/rbd.c b/block/rbd.c
index 171c67e3a0..9bd2bce716 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -1247,6 +1247,7 @@ static QemuOptsList qemu_rbd_create_opts = {
 
 static const char *const qemu_rbd_strong_runtime_opts[] = {
     "pool",
+    "namespace",
     "image",
     "conf",
     "snapshot",