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-rw-r--r--src/add1.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/add1.c b/src/add1.c
index f1419f7f1..dfb62b3c1 100644
--- a/src/add1.c
+++ b/src/add1.c
@@ -189,7 +189,7 @@ mpfr_add1 (mpfr_ptr a, mpfr_srcptr b, mpfr_srcptr c, mpfr_rnd_t rnd_mode)
mask = MPFR_LIMB_MASK (sh);
bb = ap[0] & mask;
- ap[0] &= (~mask) << 1;
+ ap[0] &= MPFR_LIMB_LSHIFT (~mask, 1);
if (bb == 0)
fb = 0;
else if (bb == mask)