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-rw-r--r--stdio-common/printf_fp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/stdio-common/printf_fp.c b/stdio-common/printf_fp.c
index 009bdee0d5..4e6104a71b 100644
--- a/stdio-common/printf_fp.c
+++ b/stdio-common/printf_fp.c
@@ -337,7 +337,7 @@ __printf_fp (FILE *fp,
would be really big it could lead to memory problems. */
{
mp_size_t bignum_size = ((ABS (exponent) + BITS_PER_MP_LIMB - 1)
- / BITS_PER_MP_LIMB + 3) * sizeof (mp_limb);
+ / BITS_PER_MP_LIMB + 4) * sizeof (mp_limb);
frac = (mp_limb *) alloca (bignum_size);
tmp = (mp_limb *) alloca (bignum_size);
scale = (mp_limb *) alloca (bignum_size);