--- /ext/openssl/openssl.c_orig	2020-12-01 13:06:42.165146159 +0100
+++ /ext/openssl/openssl.c	2020-12-01 13:07:11.164560626 +0100
@@ -6901,7 +6901,9 @@
 	int cipher_mode = EVP_CIPHER_mode(cipher_type);
 	memset(mode, 0, sizeof(struct php_openssl_cipher_mode));
 	switch (cipher_mode) {
-#if PHP_OPENSSL_API_VERSION >= 0x10100
+#ifdef EVP_CIPH_OCB_MODE
+		/* Since OpenSSL 1.1, all AEAD ciphers use a common framework. We check for
+		 * EVP_CIPH_OCB_MODE, because LibreSSL does not support it. */
 		case EVP_CIPH_GCM_MODE:
 		case EVP_CIPH_OCB_MODE:
 		case EVP_CIPH_CCM_MODE: