diff --git a/hw/usb/dev-storage-classic.c b/hw/usb/dev-storage-classic.c
index 50a3ad6285..6147387dc6 100644
--- a/hw/usb/dev-storage-classic.c
+++ b/hw/usb/dev-storage-classic.c
@@ -38,15 +38,6 @@ static void usb_msd_storage_realize(USBDevice *dev, Error **errp)
         return;
     }
 
-    if (!blkconf_blocksizes(&s->conf, errp)) {
-        return;
-    }
-
-    if (!blkconf_apply_backend_options(&s->conf, !blk_supports_write_perm(blk),
-                                       true, errp)) {
-        return;
-    }
-
     /*
      * Hack alert: this pretends to be a block device, but it's really
      * a SCSI bus that can serve only a single device, which it