diff '--color=auto' -urN php-8.5.0.orig/ext/openssl/openssl.stub.php php-8.5.0/ext/openssl/openssl.stub.php
--- php-8.5.0.orig/ext/openssl/openssl.stub.php	2025-11-26 13:24:27.131606656 +0100
+++ php-8.5.0/ext/openssl/openssl.stub.php	2025-11-26 13:35:22.345946564 +0100
@@ -185,7 +185,9 @@
  * @var int
  * @cvalue PKCS7_NO_DUAL_CONTENT
  */
+#if !defined (LIBRESSL_VERSION_NUMBER)
 const PKCS7_NO_DUAL_CONTENT = UNKNOWN;
+#endif
 
 /**
  * @var int
diff '--color=auto' -urN php-8.5.0.orig/ext/openssl/openssl_arginfo.h php-8.5.0/ext/openssl/openssl_arginfo.h
--- php-8.5.0.orig/ext/openssl/openssl_arginfo.h	2025-11-26 13:24:27.131643706 +0100
+++ php-8.5.0/ext/openssl/openssl_arginfo.h	2025-11-26 13:35:03.581391159 +0100
@@ -589,7 +589,9 @@
 	REGISTER_LONG_CONSTANT("PKCS7_NOSMIMECAP", PKCS7_NOSMIMECAP, CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("PKCS7_CRLFEOL", PKCS7_CRLFEOL, CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("PKCS7_NOCRL", PKCS7_NOCRL, CONST_PERSISTENT);
+#if !defined (LIBRESSL_VERSION_NUMBER)
 	REGISTER_LONG_CONSTANT("PKCS7_NO_DUAL_CONTENT", PKCS7_NO_DUAL_CONTENT, CONST_PERSISTENT);
+#endif
 	REGISTER_LONG_CONSTANT("OPENSSL_CMS_DETACHED", CMS_DETACHED, CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("OPENSSL_CMS_TEXT", CMS_TEXT, CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("OPENSSL_CMS_NOINTERN", CMS_NOINTERN, CONST_PERSISTENT);