detect alpn by feature flag not openssl version (closes #23329)
diff --git a/Misc/NEWS b/Misc/NEWS
index 249bd5a..1e13f63 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -21,6 +21,9 @@
Library
-------
+- Issue #23329: Allow the ssl module to be built with older versions of
+ LibreSSL.
+
- Prevent overflow in _Unpickler_Read.
- Issue #25047: The XML encoding declaration written by Element Tree now
diff --git a/Modules/_ssl.c b/Modules/_ssl.c
index ca3549c..e43c502 100644
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -109,8 +109,7 @@
# define HAVE_SNI 0
#endif
-/* ALPN added in OpenSSL 1.0.2 */
-#if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER >= 0x1000200fL && !defined(OPENSSL_NO_TLSEXT)
+#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
# define HAVE_ALPN
#endif