diff --git a/cryptography/hazmat/bindings/openssl/x509.py b/cryptography/hazmat/bindings/openssl/x509.py
index e800d27..9287036 100644
--- a/cryptography/hazmat/bindings/openssl/x509.py
+++ b/cryptography/hazmat/bindings/openssl/x509.py
@@ -160,6 +160,8 @@
 
 int i2d_PrivateKey_bio(BIO *, EVP_PKEY *);
 EVP_PKEY *d2i_PrivateKey_bio(BIO *, EVP_PKEY **);
+int i2d_PUBKEY_bio(BIO *, EVP_PKEY *);
+EVP_PKEY *d2i_PUBKEY_bio(BIO *, EVP_PKEY **);
 
 ASN1_INTEGER *X509_get_serialNumber(X509 *);
 int X509_set_serialNumber(X509 *, ASN1_INTEGER *);
@@ -178,6 +180,22 @@
 const char *X509_get_default_cert_dir_env(void);
 const char *X509_get_default_cert_file_env(void);
 const char *X509_get_default_private_dir(void);
+
+int i2d_RSA_PUBKEY(RSA *, unsigned char **);
+RSA *d2i_RSA_PUBKEY(RSA **, const unsigned char **, long);
+int i2d_DSA_PUBKEY(DSA *, unsigned char **);
+DSA *d2i_DSA_PUBKEY(DSA **, const unsigned char **, long);
+
+RSA *d2i_RSAPrivateKey_bio(BIO *, RSA **);
+int i2d_RSAPrivateKey_bio(BIO *, RSA *);
+RSA *d2i_RSAPublicKey_bio(BIO *, RSA **);
+int i2d_RSAPublicKey_bio(BIO *, RSA *);
+RSA *d2i_RSA_PUBKEY_bio(BIO *, RSA **);
+int i2d_RSA_PUBKEY_bio(BIO *, RSA *);
+DSA *d2i_DSA_PUBKEY_bio(BIO *, DSA **);
+int i2d_DSA_PUBKEY_bio(BIO *, DSA *);
+DSA *d2i_DSAPrivateKey_bio(BIO *, DSA **);
+int i2d_DSAPrivateKey_bio(BIO *, DSA *);
 """
 
 MACROS = """
@@ -213,6 +231,13 @@
    RHEL/CentOS 5 we should move these back to FUNCTIONS. */
 int X509_REQ_add_extensions(X509_REQ *, X509_EXTENSIONS *);
 X509_EXTENSIONS *X509_REQ_get_extensions(X509_REQ *);
+
+int i2d_EC_PUBKEY(EC_KEY *, unsigned char **);
+EC_KEY *d2i_EC_PUBKEY(EC_KEY **, const unsigned char **, long);
+EC_KEY *d2i_EC_PUBKEY_bio(BIO *, EC_KEY **);
+int i2d_EC_PUBKEY_bio(BIO *, EC_KEY *);
+EC_KEY *d2i_ECPrivateKey_bio(BIO *, EC_KEY **);
+int i2d_ECPrivateKey_bio(BIO *, EC_KEY *);
 """
 
 CUSTOMIZATIONS = """
@@ -220,6 +245,23 @@
 #if OPENSSL_VERSION_NUMBER <= 0x0090805fL
 typedef STACK_OF(X509_EXTENSION) X509_EXTENSIONS;
 #endif
+#ifdef OPENSSL_NO_EC
+int (*i2d_EC_PUBKEY)(EC_KEY *, unsigned char **) = NULL;
+EC_KEY *(*d2i_EC_PUBKEY)(EC_KEY **, const unsigned char **, long) = NULL;
+EC_KEY *(*d2i_EC_PUBKEY_bio)(BIO *, EC_KEY **) = NULL;
+int (*i2d_EC_PUBKEY_bio)(BIO *, EC_KEY *) = NULL;
+EC_KEY *(*d2i_ECPrivateKey_bio)(BIO *, EC_KEY **) = NULL;
+int (*i2d_ECPrivateKey_bio)(BIO *, EC_KEY *) = NULL;
+#endif
 """
 
-CONDITIONAL_NAMES = {}
+CONDITIONAL_NAMES = {
+    "Cryptography_HAS_EC": [
+        "i2d_EC_PUBKEY",
+        "d2i_EC_PUBKEY",
+        "d2i_EC_PUBKEY_bio",
+        "i2d_EC_PUBKEY_bio",
+        "d2i_ECPrivateKey_bio",
+        "i2d_ECPrivateKey_bio",
+    ]
+}