diff --git a/cbits/p256/p256.c b/cbits/p256/p256.c
index 04060f8..4f6a573 100644
--- a/cbits/p256/p256.c
+++ b/cbits/p256/p256.c
@@ -376,7 +376,8 @@ void cryptonite_p256_to_bin(const cryptonite_p256_int* src, uint8_t dst[P256_NBY
 {
 	int i;
 	uint8_t* p = &dst[0];
-	for (i = P256_NDIGITS -1; i > 0; --i) {
+
+	for (i = P256_NDIGITS -1; i >= 0; --i) {
 		const cryptonite_p256_digit dig = P256_DIGIT(src, i);
 		p[0] = dig >> 24;
 		p[1] = dig >> 16;