--- a/src/mosquitto_broker_internal.h
+++ b/src/mosquitto_broker_internal.h
@@ -39,6 +39,8 @@
 #    define libwebsocket_callback_reasons lws_callback_reasons
 #    define libwebsocket lws
 #  endif
+
+#define lws_pollfd pollfd
 #endif
 
 #include "mosquitto_internal.h"
--- a/src/websockets.c
+++ b/src/websockets.c
@@ -490,7 +490,11 @@
 	struct stat filestat;
 	struct mosquitto_db *db = &int_db;
 	struct mosquitto *mosq;
+#ifdef LWS_LIBRARY_VERSION_NUMBER
 	struct lws_pollargs *pollargs = (struct lws_pollargs *)in;
+#else
+	int fd;
+#endif
 
 	/* FIXME - ssl cert verification is done here. */
 
@@ -627,11 +631,21 @@
 
 		case LWS_CALLBACK_ADD_POLL_FD:
 		case LWS_CALLBACK_DEL_POLL_FD:
+#ifdef LWS_LIBRARY_VERSION_NUMBER
 		case LWS_CALLBACK_CHANGE_MODE_POLL_FD:
 			HASH_FIND(hh_sock, db->contexts_by_sock, &pollargs->fd, sizeof(pollargs->fd), mosq);
 			if(mosq && (pollargs->events & POLLOUT)){
 				mosq->ws_want_write = true;
 			}
+#else
+		case LWS_CALLBACK_SET_MODE_POLL_FD:
+			fd = (int)(long)user;
+
+			HASH_FIND(hh_sock, db->contexts_by_sock, &fd, sizeof(fd), mosq);
+			if(mosq){
+				mosq->ws_want_write = true;
+			}
+#endif
 			break;
 
 		default:
--- a/src/loop.c
+++ b/src/loop.c
@@ -679,7 +679,11 @@
 			wspoll.events = pollfds[context->pollfd_index].events;
 			wspoll.revents = pollfds[context->pollfd_index].revents;
 #endif
+#if defined(LWS_LIBRARY_VERSION_NUMBER)
 			lws_service_fd(lws_get_context(context->wsi), &wspoll);
+#else
+			libwebsocket_service_fd(context->ws_context, &wspoll);
+#endif
 			continue;
 		}
 #endif