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-rw-r--r--libtommath/bn_s_mp_sub.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libtommath/bn_s_mp_sub.c b/libtommath/bn_s_mp_sub.c
index 8091f4a..7f49d66 100644
--- a/libtommath/bn_s_mp_sub.c
+++ b/libtommath/bn_s_mp_sub.c
@@ -17,7 +17,7 @@
/* low level subtraction (assumes |a| > |b|), HAC pp.595 Algorithm 14.9 */
int
-s_mp_sub (mp_int * a, mp_int * b, mp_int * c)
+s_mp_sub (const mp_int * a, const mp_int * b, mp_int * c)
{
int olduse, res, min, max;