diff --git a/lib/x509/verify.c b/lib/x509/verify.c

index cb8289e..86a901e 100644

--- a/lib/x509/verify.c

+++ b/lib/x509/verify.c

@@ -674,7 +674,10 @@ _gnutls_x509_verify_certificate (const gnutls_x509_crt_t * certificate_list,

        * certificates can exist in a supplied chain.

        */

       if (!(flags & GNUTLS_VERIFY_ALLOW_ANY_X509_V1_CA_CRT))

-        flags &= ~(GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT);

+        {

+          flags &= ~(GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT);

+          flags |= GNUTLS_VERIFY_DO_NOT_ALLOW_X509_V1_CA_CRT;

+        }

       if ((ret =

            _gnutls_verify_certificate2 (certificate_list[i - 1],

                                         &certificate_list[i], 1, flags,