diff --git a/src/_cffi_src/openssl/evp.py b/src/_cffi_src/openssl/evp.py
index 6582882..18d6d62 100644
--- a/src/_cffi_src/openssl/evp.py
+++ b/src/_cffi_src/openssl/evp.py
@@ -173,14 +173,7 @@
 """
 
 CUSTOMIZATIONS = """
-#ifdef EVP_CTRL_GCM_SET_TAG
 const long Cryptography_HAS_GCM = 1;
-#else
-const long Cryptography_HAS_GCM = 0;
-const long EVP_CTRL_GCM_GET_TAG = -1;
-const long EVP_CTRL_GCM_SET_TAG = -1;
-const long EVP_CTRL_GCM_SET_IVLEN = -1;
-#endif
 
 const long Cryptography_HAS_PBKDF2_HMAC = 1;
 const long Cryptography_HAS_PKEY_CTX = 1;
diff --git a/src/_cffi_src/openssl/ssl.py b/src/_cffi_src/openssl/ssl.py
index 7a041e5..4daa4d8 100644
--- a/src/_cffi_src/openssl/ssl.py
+++ b/src/_cffi_src/openssl/ssl.py
@@ -519,22 +519,8 @@
 const long SSL_MODE_RELEASE_BUFFERS = 0;
 #endif
 
-#ifdef SSL_OP_NO_COMPRESSION
 static const long Cryptography_HAS_OP_NO_COMPRESSION = 1;
-#else
-static const long Cryptography_HAS_OP_NO_COMPRESSION = 0;
-const long SSL_OP_NO_COMPRESSION = 0;
-#endif
-
-#ifdef SSL_OP_NO_TLSv1_1
 static const long Cryptography_HAS_TLSv1_1 = 1;
-#else
-static const long Cryptography_HAS_TLSv1_1 = 0;
-static const long SSL_OP_NO_TLSv1_1 = 0;
-SSL_METHOD* (*TLSv1_1_method)(void) = NULL;
-SSL_METHOD* (*TLSv1_1_client_method)(void) = NULL;
-SSL_METHOD* (*TLSv1_1_server_method)(void) = NULL;
-#endif
 
 #ifdef SSL_OP_NO_TLSv1_2
 static const long Cryptography_HAS_TLSv1_2 = 1;
@@ -557,12 +543,7 @@
 long (*SSL_CTX_set_tmp_ecdh)(SSL_CTX *, EC_KEY *) = NULL;
 #endif
 
-#ifdef SSL_OP_NO_TICKET
 static const long Cryptography_HAS_SSL_OP_NO_TICKET = 1;
-#else
-static const long Cryptography_HAS_SSL_OP_NO_TICKET = 0;
-const long SSL_OP_NO_TICKET = 0;
-#endif
 
 static const long Cryptography_HAS_SSL_SET_SSL_CTX = 1;
 
diff --git a/src/cryptography/hazmat/bindings/openssl/_conditional.py b/src/cryptography/hazmat/bindings/openssl/_conditional.py
index 5d377d1..c95a9fe 100644
--- a/src/cryptography/hazmat/bindings/openssl/_conditional.py
+++ b/src/cryptography/hazmat/bindings/openssl/_conditional.py
@@ -182,11 +182,6 @@
     "Cryptography_HAS_RSA_R_PKCS_DECODING_ERROR": [
         "RSA_R_PKCS_DECODING_ERROR"
     ],
-    "Cryptography_HAS_GCM": [
-        "EVP_CTRL_GCM_GET_TAG",
-        "EVP_CTRL_GCM_SET_TAG",
-        "EVP_CTRL_GCM_SET_IVLEN",
-    ],
     "Cryptography_HAS_EGD": [
         "RAND_egd",
         "RAND_egd_bytes",
@@ -195,12 +190,6 @@
     "Cryptography_HAS_RSA_OAEP_MD": [
         "EVP_PKEY_CTX_set_rsa_oaep_md",
     ],
-    "Cryptography_HAS_TLSv1_1": [
-        "SSL_OP_NO_TLSv1_1",
-        "TLSv1_1_method",
-        "TLSv1_1_server_method",
-        "TLSv1_1_client_method",
-    ],
 
     "Cryptography_HAS_TLSv1_2": [
         "SSL_OP_NO_TLSv1_2",
@@ -219,18 +208,10 @@
         "SSL_MODE_RELEASE_BUFFERS",
     ],
 
-    "Cryptography_HAS_OP_NO_COMPRESSION": [
-        "SSL_OP_NO_COMPRESSION",
-    ],
-
     "Cryptography_HAS_SSL_OP_MSIE_SSLV2_RSA_PADDING": [
         "SSL_OP_MSIE_SSLV2_RSA_PADDING",
     ],
 
-    "Cryptography_HAS_SSL_OP_NO_TICKET": [
-        "SSL_OP_NO_TICKET",
-    ],
-
     "Cryptography_HAS_NETBSD_D1_METH": [
         "DTLSv1_method",
     ],