diff --git a/build_library/vm_image_util.sh b/build_library/vm_image_util.sh
index a2f3e32e8b..3dcf608c5d 100644
--- a/build_library/vm_image_util.sh
+++ b/build_library/vm_image_util.sh
@@ -296,7 +296,7 @@ _write_qemu_conf() {
 [drive]
     media = "disk"
     index = "0"
-    #if = "virtio"
+#   if = "virtio"
     file = "${dst_name}"
     format = "raw"