Update from stable branch.
diff --git a/ssl/tls1.h b/ssl/tls1.h
index d831eec..22399b9 100644
--- a/ssl/tls1.h
+++ b/ssl/tls1.h
@@ -279,6 +279,9 @@
 #define SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg) \
 SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TLSEXT_OPAQUE_PRF_INPUT_CB_ARG, 0, arg)
 
+#define SSL_CTX_set_tlsext_ticket_key_cb(ssl, cb) \
+SSL_CTX_callback_ctrl(ssl,SSL_CTRL_SET_TLSEXT_TICKET_KEY_CB,(void (*)(void))cb)
+
 #endif
 
 /* PSK ciphersuites from 4279 */