diff --git a/grub-core/disk/lvm.c b/grub-core/disk/lvm.c
index 794248540..0c32c95f9 100644
--- a/grub-core/disk/lvm.c
+++ b/grub-core/disk/lvm.c
@@ -290,7 +290,7 @@ grub_lvm_detect (grub_disk_t disk,
 
   p = q = (char *)ptr;
 
-  if (grub_add ((grub_size_t)metadatabuf, (grub_size_t)mda_size, &ptr))
+  if (grub_add (ptr, (grub_size_t) grub_le_to_cpu64 (rlocn->size), &ptr))
     goto error_parsing_metadata;
 
   mda_end = (char *)ptr;