diff --git a/kernel/fs/portlfs/portlfs.c b/kernel/fs/portlfs/portlfs.c
index 77f7880..df9853a 100644
--- a/kernel/fs/portlfs/portlfs.c
+++ b/kernel/fs/portlfs/portlfs.c
@@ -224,7 +224,7 @@ int portlfs_read(const struct lfs_config *c, lfs_block_t block, lfs_off_t off, v
   ptrdiff_t sector = byteaddr / vmp->backingsd->sectorsize;
   ptrdiff_t sector_off = byteaddr % vmp->backingsd->sectorsize;
 
-  int32_t ret = vmp->backingsd->read(vmp->backingsd, (const uint8_t *)buffer, sector, sector_off, size);
+  int32_t ret = vmp->backingsd->read(vmp->backingsd, (uint8_t *const)buffer, sector, sector_off, size);
   if (ret != E_OK)
     return LFS_ERR_IO;
   return 0;