--- /dev/null
+#include "tommath_private.h"
+#ifdef BN_MP_ISODD_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+
+mp_bool mp_isodd(const mp_int *a)
+{
+ return MP_IS_ODD(a) ? MP_YES : MP_NO;
+}
+#endif