literal suffix
diff --git a/bn_mp_to_ubin.c b/bn_mp_to_ubin.c
index 5e4a5da..1681ca7 100644
--- a/bn_mp_to_ubin.c
+++ b/bn_mp_to_ubin.c
@@ -19,7 +19,7 @@ mp_err mp_to_ubin(const mp_int *a, unsigned char *buf, size_t maxlen, size_t *wr
return err;
}
- for (x = count; x --> 0;) {
+ for (x = count; x --> 0u;) {
#ifndef MP_8BIT
buf[x] = (unsigned char)(t.dp[0] & 255u);
#else