-#if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
-# define EXIM_HAVE_ASN1_MACROS
-# define EXIM_OPAQUE_X509
-#else
-# define X509_STORE_CTX_get_verify(ctx) (ctx)->verify
-# define X509_STORE_CTX_get_verify_cb(ctx) (ctx)->verify_cb
-# define X509_STORE_CTX_get0_cert(ctx) (ctx)->cert
-# define X509_STORE_CTX_get0_chain(ctx) (ctx)->chain
-# define X509_STORE_CTX_get0_untrusted(ctx) (ctx)->untrusted
-
-# define X509_STORE_CTX_set_verify(ctx, verify_chain) (ctx)->verify = (verify_chain)
-# define X509_STORE_CTX_set0_verified_chain(ctx, sk) (ctx)->chain = (sk)
-# define X509_STORE_CTX_set_error_depth(ctx, val) (ctx)->error_depth = (val)
-# define X509_STORE_CTX_set_current_cert(ctx, cert) (ctx)->current_cert = (cert)
-
-# define ASN1_STRING_get0_data ASN1_STRING_data
-# define X509_getm_notBefore X509_get_notBefore
-# define X509_getm_notAfter X509_get_notAfter
-
-# define CRYPTO_ONCE_STATIC_INIT 0
-# define CRYPTO_THREAD_run_once run_once
+
+#ifdef LIBRESSL_VERSION_NUMBER /* LibreSSL */
+# if LIBRESSL_VERSION_NUMBER >= 0x2090000fL
+# define EXIM_HAVE_ASN1_MACROS
+# endif
+#else /* OpenSSL */
+# if OPENSSL_VERSION_NUMBER >= 0x10100000L
+# define EXIM_HAVE_ASN1_MACROS
+# define EXIM_OPAQUE_X509
+# else
+# define X509_STORE_CTX_get_verify(ctx) (ctx)->verify
+# define X509_STORE_CTX_get_verify_cb(ctx) (ctx)->verify_cb
+# define X509_STORE_CTX_get0_cert(ctx) (ctx)->cert
+# define X509_STORE_CTX_get0_chain(ctx) (ctx)->chain
+# define X509_STORE_CTX_get0_untrusted(ctx) (ctx)->untrusted
+
+# define X509_STORE_CTX_set_verify(ctx, verify_chain) (ctx)->verify = (verify_chain)
+# define X509_STORE_CTX_set0_verified_chain(ctx, sk) (ctx)->chain = (sk)
+# define X509_STORE_CTX_set_error_depth(ctx, val) (ctx)->error_depth = (val)
+# define X509_STORE_CTX_set_current_cert(ctx, cert) (ctx)->current_cert = (cert)
+
+# define ASN1_STRING_get0_data ASN1_STRING_data
+# define X509_getm_notBefore X509_get_notBefore
+# define X509_getm_notAfter X509_get_notAfter
+
+# define CRYPTO_ONCE_STATIC_INIT 0
+# define CRYPTO_THREAD_run_once run_once