diff --git a/OpenSSL/ssl/connection.c b/OpenSSL/ssl/connection.c
index 9e9794b..59ec9f6 100755
--- a/OpenSSL/ssl/connection.c
+++ b/OpenSSL/ssl/connection.c
@@ -271,6 +271,7 @@ Switch this connection to a new session context\n\
 ";
 static PyObject *
 ssl_Connection_set_context(ssl_ConnectionObj *self, PyObject *args) {
+#ifdef TLSEXT_MAXLEN_host_name
     ssl_ContextObj *ctx;
     ssl_ContextObj *old;
 
@@ -299,6 +300,10 @@ ssl_Connection_set_context(ssl_ConnectionObj *self, PyObject *args) {
 
     Py_INCREF(Py_None);
     return Py_None;
+#else
+    PyErr_SetString(PyExc_ValueError, "SSL_set_SSL_CTX not supported by this version of OpenSSL");
+    return NULL;
+#endif
 }
 
 static char ssl_Connection_get_servername_doc[] = "\n\
@@ -310,6 +315,7 @@ message, or None if there wasn't one.\n\
 ";
 static PyObject *
 ssl_Connection_get_servername(ssl_ConnectionObj *self, PyObject *args) {
+#ifdef TLSEXT_MAXLEN_host_name
     int type = TLSEXT_NAMETYPE_host_name;
     const char *name;
 
@@ -325,6 +331,10 @@ ssl_Connection_get_servername(ssl_ConnectionObj *self, PyObject *args) {
     } else {
         return PyBytes_FromString(name);
     }
+#else
+    PyErr_SetString(PyExc_ValueError, "SSL_get_servername not supported by this version of OpenSSL");
+    return NULL;
+#endif
 }
 
 
@@ -336,6 +346,7 @@ Set the value of the servername extension to send in the client hello.\n\
 ";
 static PyObject *
 ssl_Connection_set_tlsext_host_name(ssl_ConnectionObj *self, PyObject *args) {
+#ifdef TLSEXT_MAXLEN_host_name
     char *buf;
 
     if (!PyArg_ParseTuple(args, BYTESTRING_FMT ":set_tlsext_host_name", &buf)) {
@@ -347,6 +358,10 @@ ssl_Connection_set_tlsext_host_name(ssl_ConnectionObj *self, PyObject *args) {
 
     Py_INCREF(Py_None);
     return Py_None;
+#else
+    PyErr_SetString(PyExc_ValueError, "SSL_set_tlsext_host_name not supported by this version of OpenSSL");
+    return NULL;
+#endif
 }
 
 
diff --git a/OpenSSL/ssl/context.c b/OpenSSL/ssl/context.c
index c2bdcab..6d38822 100644
--- a/OpenSSL/ssl/context.c
+++ b/OpenSSL/ssl/context.c
@@ -1117,6 +1117,7 @@ Specify a callback function to be called when clients specify a server name.\n\
 ";
 static PyObject *
 ssl_Context_set_tlsext_servername_callback(ssl_ContextObj *self, PyObject *args) {
+#ifdef TLSEXT_MAXLEN_host_name
     PyObject *callback;
     PyObject *old;
 
@@ -1134,6 +1135,10 @@ ssl_Context_set_tlsext_servername_callback(ssl_ContextObj *self, PyObject *args)
 
     Py_INCREF(Py_None);
     return Py_None;
+#else
+    PyErr_SetString(PyExc_ValueError, "SSL_CTX_set_tlsext_servername_callback not supported by this version of OpenSSL");
+    return NULL;
+#endif
 }