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-rw-r--r--libtommath/tommath.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/libtommath/tommath.h b/libtommath/tommath.h
index bcb9d86..ce8591f 100644
--- a/libtommath/tommath.h
+++ b/libtommath/tommath.h
@@ -217,7 +217,7 @@ int mp_init_size(mp_int *a, int size);
/* ---> Basic Manipulations <--- */
#define mp_iszero(a) (((a)->used == 0) ? MP_YES : MP_NO)
-#define mp_iseven(a) (((a)->used > 0 && (((a)->dp[0] & 1) == 0)) ? MP_YES : MP_NO)
+#define mp_iseven(a) (((a)->used == 0 || (((a)->dp[0] & 1) == 0)) ? MP_YES : MP_NO)
#define mp_isodd(a) (((a)->used > 0 && (((a)->dp[0] & 1) == 1)) ? MP_YES : MP_NO)
/* set to zero */