diff --git a/lfs.c b/lfs.c
index d976389..c0092ca 100644
--- a/lfs.c
+++ b/lfs.c
@@ -3761,6 +3761,12 @@ static int lfs_rawmount(lfs_t *lfs, const struct lfs_config *cfg) {
 
                 lfs->attr_max = superblock.attr_max;
             }
+
+            if (superblock.block_count != lfs->cfg->block_count)
+            {
+                err = LFS_ERR_CORRUPT;
+                goto cleanup;
+            }
         }
 
         // has gstate?