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-rw-r--r--libtommath/bn_mp_sub.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libtommath/bn_mp_sub.c b/libtommath/bn_mp_sub.c
index 2f73faa..9ff03d5 100644
--- a/libtommath/bn_mp_sub.c
+++ b/libtommath/bn_mp_sub.c
@@ -17,7 +17,7 @@
/* high level subtraction (handles signs) */
int
-mp_sub (mp_int * a, mp_int * b, mp_int * c)
+mp_sub (const mp_int * a, const mp_int * b, mp_int * c)
{
int sa, sb, res;