diff --git a/key.go b/key.go
index dae9eb0..c7b4665 100644
--- a/key.go
+++ b/key.go
@@ -45,11 +45,11 @@ const (
 	KeyTypeDSA4    = NID_dsaWithSHA1_2
 	KeyTypeDH      = NID_dhKeyAgreement
 	KeyTypeDHX     = NID_dhpublicnumber
-	KeyTypeEC      = NID_x9_62_id_ecPublicKey
+	KeyTypeEC      = NID_X9_62_id_ecPublicKey
 	KeyTypeHMAC    = NID_hmac
 	KeyTypeCMAC    = NID_cmac
 	KeyTypeTLS1PRF = NID_tls1_prf
-	KeyTypeHKDF    = NID_hdkf
+	KeyTypeHKDF    = NID_hkdf
 )
 
 type PublicKey interface {
diff --git a/nid.go b/nid.go
index f96c90a..6766b84 100644
--- a/nid.go
+++ b/nid.go
@@ -197,10 +197,10 @@ const (
 	NID_ad_OCSP                            NID = 178
 	NID_ad_ca_issuers                      NID = 179
 	NID_OCSP_sign                          NID = 180
-	NID_x9_62_id_ecPublicKey               NID = 408
+	NID_X9_62_id_ecPublicKey               NID = 408
 	NID_hmac                               NID = 855
 	NID_cmac                               NID = 894
 	NID_dhpublicnumber                     NID = 920
 	NID_tls1_prf                           NID = 1021
-	NID_hdkf                               NID = 1036
+	NID_hkdf                               NID = 1036
 )