diff --git a/handshake_client.go b/handshake_client.go
index e1cf0bc..1be44d8 100644
--- a/handshake_client.go
+++ b/handshake_client.go
@@ -1089,7 +1089,7 @@ func (c *Conn) verifyServerCertificate(certificates [][]byte) error {
 	for i, asn1Data := range certificates {
 		cert, err := globalCertCache.newCert(asn1Data)
 		if err != nil {
-			c.sendAlert(alertBadCertificate)
+			c.sendAlert(alertDecodeError)
 			return errors.New("tls: failed to parse certificate from server: " + err.Error())
 		}
 		if cert.cert.PublicKeyAlgorithm == x509.RSA {
diff --git a/handshake_server.go b/handshake_server.go
index 333b179..1216368 100644
--- a/handshake_server.go
+++ b/handshake_server.go
@@ -896,7 +896,7 @@ func (c *Conn) processCertsFromClient(certificate Certificate) error {
 	var err error
 	for i, asn1Data := range certificates {
 		if certs[i], err = x509.ParseCertificate(asn1Data); err != nil {
-			c.sendAlert(alertBadCertificate)
+			c.sendAlert(alertDecodeError)
 			return errors.New("tls: failed to parse client certificate: " + err.Error())
 		}
 		if certs[i].PublicKeyAlgorithm == x509.RSA {