diff --git a/ecdsa.c b/ecdsa.c
index 748a578ced..208808afd0 100644
--- a/ecdsa.c
+++ b/ecdsa.c
@@ -361,7 +361,7 @@ void ecdsa_get_address(const uint8_t *pub_key, uint8_t version, char *addr)
 
 	memcpy(a + 28, a, 4); // checksum
 	memset(a, 0, 7);      // zeroes
-	memcpy(a + 7, b, 21); // ripemd160(sha256(version + pubkey)
+	memcpy(a + 7, b, 21); // version || ripemd160(sha256(pubkey))
 
 	bn_read_be(a, &c);
 
diff --git a/tests.c b/tests.c
index 7742466e44..574a99f13b 100644
--- a/tests.c
+++ b/tests.c
@@ -655,7 +655,7 @@ END_TEST
 
 START_TEST(test_ecdsa_der)
 {
-	uint8_t sig[64], der[70];
+	uint8_t sig[64], der[72];
 	int res;
 
 	memcpy(sig,      fromhex("9a0b7be0d4ed3146ee262b42202841834698bb3ee39c24e7437df208b8b70771"), 32);