diff --git a/lib/hx509/crypto.c b/lib/hx509/crypto.c
index 8f03c90d0..deca13e0e 100644
--- a/lib/hx509/crypto.c
+++ b/lib/hx509/crypto.c
@@ -1353,12 +1353,12 @@ _hx509_generate_private_key(hx509_context context,
 
 static const heim_octet_string null_entry_oid = { 2, rk_UNCONST("\x05\x00") };
 
-static const unsigned sha512_oid_tree[] = { 2, 16, 840, 1, 101, 3, 4, 3 };
+static const unsigned sha512_oid_tree[] = { 2, 16, 840, 1, 101, 3, 4, 2, 3 };
 const AlgorithmIdentifier _hx509_signature_sha512_data = { 
     { 9, rk_UNCONST(sha512_oid_tree) }, rk_UNCONST(&null_entry_oid)
 };
 
-static const unsigned sha384_oid_tree[] = { 2, 16, 840, 1, 101, 3, 4, 2 };
+static const unsigned sha384_oid_tree[] = { 2, 16, 840, 1, 101, 3, 4, 2, 2 };
 const AlgorithmIdentifier _hx509_signature_sha384_data = { 
     { 9, rk_UNCONST(sha384_oid_tree) }, rk_UNCONST(&null_entry_oid)
 };