diff --git a/src/crypto/x509/x509.go b/src/crypto/x509/x509.go
index c93a7663f1..6004d5cd23 100644
--- a/src/crypto/x509/x509.go
+++ b/src/crypto/x509/x509.go
@@ -1133,7 +1133,7 @@ func parseCertificate(in *certificate) (*Certificate, error) {
 				if rest, err := asn1.Unmarshal(e.Value, &keyid); err != nil {
 					return nil, err
 				} else if len(rest) != 0 {
-					return nil, errors.New("x509: trailing data after X.509 authority key-id")
+					return nil, errors.New("x509: trailing data after X.509 key-id")
 				}
 				out.SubjectKeyId = keyid