diff --git a/cr_deviceCert.c b/cr_deviceCert.c
index 9fb4d35..8ec063b 100644
--- a/cr_deviceCert.c
+++ b/cr_deviceCert.c
@@ -259,8 +259,7 @@ int GenerateCTRDeviceCert( EC_KEY *pECkey, u32 deviceId, u8 bondingOption, u8 *p
 		// DERデコードして、r と s を eccSignature にセット
 		sig = d2i_ECDSA_SIG( NULL, &pECDSAsig, signLen );
 		if( sig == NULL ) {
-			// TODO: エラーコードを決める
-			ret_code = 255;
+			ret_code = CR_GENID_ERROR_ECDSA_DECODE;
 			goto end;
 		}
 #if 0
diff --git a/cr_generate_id.h b/cr_generate_id.h
index d53a93f..387224d 100644
--- a/cr_generate_id.h
+++ b/cr_generate_id.h
@@ -118,6 +118,7 @@
 //---------------------------------------------------
 // OpenSSL�̏������ʂɂ��G���[�R�[�h
 //---------------------------------------------------
+// TODO : ��ޖ��Ƀ\�[�g����K�v����
 #define CR_GENID_ERROR_RSA_ENC                 ( -1)
 #define CR_GENID_ERROR_RSA_DEC                 ( -2)
 #define CR_GENID_ERROR_RSA_VERIFY              ( -3)
@@ -144,6 +145,7 @@
 #define CR_GENID_ERROR_AES_VERIFY              (-24)
 #define CR_GENID_ERROR_CERT_BUF_SIZE           (-25)
 #define CR_GENID_ERROR_ECC_READ_PRIVATE_KEY    (-26)
+#define CR_GENID_ERROR_ECDSA_DECODE            (-27)
 
 //---------------------------------------------------
 // HSM�̏������ʂɂ��G���[�R�[�h