diff --git a/src/tools/rbd_nbd/rbd-nbd.cc b/src/tools/rbd_nbd/rbd-nbd.cc
index 08384d42eba..f49ea6ade5a 100644
--- a/src/tools/rbd_nbd/rbd-nbd.cc
+++ b/src/tools/rbd_nbd/rbd-nbd.cc
@@ -510,7 +510,6 @@ static int do_map()
   int fd[2];
   int nbd;
 
-  uint8_t old_format;
   librbd::image_info_t info;
 
   Preforker forker;
@@ -659,10 +658,6 @@ static int do_map()
     goto close_nbd;
   }
 
-  r = image.old_format(&old_format);
-  if (r < 0)
-    goto close_nbd;
-
   {
     uint64_t handle;