diff --git a/daemon/main.c b/daemon/main.c
index 094cb07c3..eb4c71a5f 100644
--- a/daemon/main.c
+++ b/daemon/main.c
@@ -808,7 +808,9 @@ static void options(int *argc, char ***argv, charp_ht templates) {
 		{ "https-cert", 0,0,	G_OPTION_ARG_FILENAME,	&rtpe_config.https_cert,"Certificate for HTTPS and WSS","FILE"},
 		{ "https-key", 0,0,	G_OPTION_ARG_FILENAME,	&rtpe_config.https_key,	"Private key for HTTPS and WSS","FILE"},
 		{ "http-threads", 0,0,	G_OPTION_ARG_INT,	&rtpe_config.http_threads,"Number of worker threads for HTTP and WS","INT"},
+#if LWS_LIBRARY_VERSION_MAJOR >= 3 || (LWS_LIBRARY_VERSION_MAJOR == 2 && LWS_LIBRARY_VERSION_MINOR >= 1)
 		{ "http-buf-size", 0,0,	G_OPTION_ARG_INT,	&rtpe_config.http_buf_size,"Send buffer size for HTTP and WS in kB","INT"},
+#endif
 		{ "software-id", 0,0,	G_OPTION_ARG_STRING,	&rtpe_config.software_id,"Identification string of this software presented to external systems","STRING"},
 		{ "poller-per-thread", 0,0,	G_OPTION_ARG_NONE,	&rtpe_config.poller_per_thread,	"Use poller per thread",	NULL },
 		{ "timer-accuracy", 0,0,G_OPTION_ARG_INT,	&rtpe_config.timer_accuracy,"Minimum number of microseconds to sleep","INT"},
@@ -1052,11 +1054,13 @@ static void options(int *argc, char ***argv, charp_ht templates) {
 		die("Missing option --listen-tcp, --listen-udp, --listen-ng, --listen-tcp-ng, "
 				"--listen-http, or --listen-https");
 
+#if LWS_LIBRARY_VERSION_MAJOR >= 3 || (LWS_LIBRARY_VERSION_MAJOR == 2 && LWS_LIBRARY_VERSION_MINOR >= 1)
 	static const size_t max_buf_size =
 		((1LL << (sizeof(((struct lws_context_creation_info) {}).pt_serv_buf_size) * 8 - 1))
 		 - 1) / 1024;
 	if (rtpe_config.http_buf_size >= max_buf_size)
 		die("Option 'http-buf-size' too large (must be <%zu)", max_buf_size);
+#endif
 
 	if (graphitep) {
 		if (!endpoint_parse_any_getaddrinfo_full(&rtpe_config.graphite_ep, graphitep))
diff --git a/daemon/websocket.c b/daemon/websocket.c
index 94ea9011d..2c2267443 100644
--- a/daemon/websocket.c
+++ b/daemon/websocket.c
@@ -1160,7 +1160,9 @@ int websocket_init(void) {
 			LWS_SERVER_OPTION_FAIL_UPON_UNABLE_TO_BIND |
 #endif
 			0,
+#if LWS_LIBRARY_VERSION_MAJOR >= 3 || (LWS_LIBRARY_VERSION_MAJOR == 2 && LWS_LIBRARY_VERSION_MINOR >= 1)
 		.pt_serv_buf_size = rtpe_config.http_buf_size > 0 ? rtpe_config.http_buf_size * 1024LL : 0,
+#endif
 	};
 	websocket_context = lws_create_context(&wci);
 	err = "Failed to create LWS context";
@@ -1193,7 +1195,9 @@ int websocket_init(void) {
 				.port = ep->port,
 				.iface = g_strdup(sockaddr_print_buf(&ep->address)),
 				.protocols = websocket_protocols,
+#if LWS_LIBRARY_VERSION_MAJOR >= 3 || (LWS_LIBRARY_VERSION_MAJOR == 2 && LWS_LIBRARY_VERSION_MINOR >= 1)
 				.pt_serv_buf_size = wci.pt_serv_buf_size,
+#endif
 			};
 			vhost->vhost_name = vhost->iface;
 			if (ep->address.family->af == AF_INET)
@@ -1244,7 +1248,9 @@ int websocket_init(void) {
 				.ssl_cert_filepath = rtpe_config.https_cert,
 				.ssl_private_key_filepath = rtpe_config.https_key ? : rtpe_config.https_cert,
 				.options = LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT,
+#if LWS_LIBRARY_VERSION_MAJOR >= 3 || (LWS_LIBRARY_VERSION_MAJOR == 2 && LWS_LIBRARY_VERSION_MINOR >= 1)
 				.pt_serv_buf_size = wci.pt_serv_buf_size,
+#endif
 				// XXX cipher list, key password
 			};
 			vhost->vhost_name = vhost->iface;