diff --git a/cryptography/hazmat/backends/openssl/ssl.py b/cryptography/hazmat/backends/openssl/ssl.py
index 596db05..c3d485b 100644
--- a/cryptography/hazmat/backends/openssl/ssl.py
+++ b/cryptography/hazmat/backends/openssl/ssl.py
@@ -13,6 +13,11 @@
 
 INCLUDES = """
 #include <openssl/ssl.h>
+
+/*
+ * Get some simpler definitions for some types used by later prototypes.
+ */
+typedef STACK_OF(X509) Cryptography_STACK_OF_X509;
 """
 
 TYPES = """
@@ -110,6 +115,8 @@
 typedef ... SSL_METHOD;
 typedef ... SSL_CTX;
 
+typedef ... Cryptography_STACK_OF_X509;
+
 typedef struct {
     int master_key_length;
     unsigned char master_key[...];
@@ -157,6 +164,15 @@
 int SSL_write(SSL *, const void *, int);
 int SSL_read(SSL *, void *, int);
 X509 *SSL_get_peer_certificate(const SSL *);
+
+/*
+ * OpenSSL defines these with STACK_OF(...) but the STACK_OF macro does not
+ * play well with cffi.
+ */
+
+Cryptography_STACK_OF_X509 *SSL_get_peer_cert_chain(const SSL *);
+// Cryptography_STACK_OF_X509_NAME *SSL_get_client_CA_list(const SSL *);
+
 int SSL_get_error(const SSL *, int);
 int SSL_do_handshake(SSL *);
 int SSL_shutdown(SSL *);
@@ -186,6 +202,12 @@
 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *);
 int SSL_CTX_add_client_CA(SSL_CTX *, X509 *);
 
+/*
+ * See comment above about STACK_OF(...) vs stack_st_...
+ */
+// void SSL_CTX_set_client_CA_list(SSL_CTX *, Cryptography_STACK_OF_X509_NAME *);
+
+
 /*  X509_STORE_CTX */
 int X509_STORE_CTX_get_error(X509_STORE_CTX *);
 void X509_STORE_CTX_set_error(X509_STORE_CTX *, int);