1 files changed, 2 insertions, 1 deletions

diff --git a/lib/mpi/mpicoder.c b/lib/mpi/mpicoder.c
index 27703aad287a..24a015513b40 100644
--- a/lib/mpi/mpicoder.c
+++ b/lib/mpi/mpicoder.c
@@ -460,7 +460,8 @@ MPI mpi_read_raw_from_sgl(struct scatterlist *sgl, unsigned int nbytes)
         }
 
         if (nbytes > 0)
-                nbits -= count_leading_zeros(*(u8 *)(sg_virt(sgl) + lzeros));
+                nbits -= count_leading_zeros(*(u8 *)(sg_virt(sgl) + lzeros)) -
+                        (BITS_PER_LONG - 8);
 
         nlimbs = DIV_ROUND_UP(nbytes, BYTES_PER_MPI_LIMB);
         val = mpi_alloc(nlimbs);