diff --git a/cr_enc_id.c b/cr_enc_id.c
index dc138b2..9ae9410 100644
--- a/cr_enc_id.c
+++ b/cr_enc_id.c
@@ -135,8 +135,8 @@ extern RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length);
 static unsigned char local_buf_1[CR_ID_BUF_SIZE];
 static unsigned char local_buf_2[CR_ID_BUF_SIZE];
 
-static int crypto_aes_enc_dec( dst_buf, org_buf );
-static int crypto_rsa_enc_dec( dst_buf, org_buf );
+static int crypto_aes_enc_dec( unsigned char *dst_buf, unsigned char *org_buf );
+static int crypto_rsa_enc_dec( unsigned char *dst_buf, unsigned char *org_buf );
 
 // ビルドスイッチに応じて、IDバッファをAES/RSAで暗号化
 int EncryptID( unsigned char *dst_buf, unsigned char *org_buf )