diff --git a/CMakeLists.txt b/CMakeLists.txt
index cf0f3a26b..8465289ca 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -130,6 +130,7 @@ option(LWS_WITH_ZLIB "Include zlib support (required for extensions)" OFF)
 option(LWS_WITH_BUNDLED_ZLIB "Use bundled zlib version (Windows only)" ${LWS_WITH_BUNDLED_ZLIB_DEFAULT})
 option(LWS_WITH_MINIZ "Use miniz instead of zlib" OFF)
 option(LWS_WITH_DEPRECATED_LWS_DLL "Migrate to lws_dll2 instead ASAP" OFF)
+option(LWS_WITH_SEQUENCER "lws_seq_t support" ON)
 #
 # to use miniz, enable both LWS_WITH_ZLIB and LWS_WITH_MINIZ
 #
@@ -217,6 +218,7 @@ if (NOT LWS_WITH_NETWORK)
 	set(LWS_WITH_HTTP_STREAM_COMPRESSION 0)
 	set(LWS_WITH_HTTP_BROTLI 0)
 	set(LWS_WITH_POLL 0)
+	set(LWS_WITH_SEQUENCER 0)
 endif()
 
 if (LWS_WITH_STRUCT_SQLITE3)
@@ -957,7 +959,6 @@ if (LWS_WITH_NETWORK)
 		lib/core-net/network.c
 		lib/core-net/vhost.c
 		lib/core-net/pollfd.c
-		lib/core-net/sequencer.c
 		lib/core-net/service.c
 		lib/core-net/sorted-usec-list.c
 		lib/core-net/stats.c
@@ -966,13 +967,22 @@ if (LWS_WITH_NETWORK)
 		lib/core-net/adopt.c
 		lib/roles/pipe/ops-pipe.c
 	)
+
+	if (LWS_WITH_SEQUENCER)
+		list(APPEND SOURCES
+			lib/core-net/sequencer.c)
+	endif()
+
 	if (LWS_WITH_ABSTRACT)
 		list(APPEND SOURCES
 			lib/abstract/abstract.c
-			lib/abstract/test-sequencer.c
 		)
+		if (LWS_WITH_SEQUENCER)
+			list(APPEND SOURCES
+				lib/abstract/test-sequencer.c)
+		endif()
 	endif()
-	
+
 	if (LWS_WITH_STATS)
 		list(APPEND SOURCES
 			lib/core-net/stats.c
diff --git a/cmake/lws_config.h.in b/cmake/lws_config.h.in
index 6dc50f0c5..236a8881e 100644
--- a/cmake/lws_config.h.in
+++ b/cmake/lws_config.h.in
@@ -126,6 +126,7 @@
 #cmakedefine LWS_WITH_POLL
 #cmakedefine LWS_WITH_RANGES
 #cmakedefine LWS_WITH_SELFTESTS
+#cmakedefine LWS_WITH_SEQUENCER
 #cmakedefine LWS_WITH_SERVER_STATUS
 #cmakedefine LWS_WITH_SMTP
 #cmakedefine LWS_WITH_SOCKS5
diff --git a/lib/core-net/service.c b/lib/core-net/service.c
index 3d91a1a80..b433fda90 100644
--- a/lib/core-net/service.c
+++ b/lib/core-net/service.c
@@ -557,9 +557,10 @@ lws_service_periodic_checks(struct lws_context *context,
 	if (context->time_up < 1464083026 && now > 1464083026)
 		context->time_up = now;
 
-
+#if defined(LWS_WITH_SEQUENCER)
 	__lws_seq_timeout_check(pt, usnow);
 	lws_pt_do_pending_sequencer_events(pt);
+#endif
 
 	if (context->last_timeout_check_s == now)
 		return 0;
diff --git a/lib/core/context.c b/lib/core/context.c
index 0ed77b5e1..e0438390e 100644
--- a/lib/core/context.c
+++ b/lib/core/context.c
@@ -551,8 +551,10 @@ lws_context_destroy3(struct lws_context *context)
 
 	for (n = 0; n < context->count_threads; n++) {
 		struct lws_context_per_thread *pt = &context->pt[n];
-
+		(void)pt;
+#if defined(LWS_WITH_SEQUENCER)
 		lws_seq_destroy_all_on_pt(pt);
+#endif
 
 		if (context->event_loop_ops->destroy_pt)
 			context->event_loop_ops->destroy_pt(context, n);
diff --git a/lib/event-libs/common.c b/lib/event-libs/common.c
index f869536cf..56357be95 100644
--- a/lib/event-libs/common.c
+++ b/lib/event-libs/common.c
@@ -1,7 +1,7 @@
 /*
  * libwebsockets - small server side websockets and web server implementation
  *
- * Copyright (C) 2010-2018 Andy Green <andy@warmcat.com>
+ * Copyright (C) 2010-2019 Andy Green <andy@warmcat.com>
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
@@ -38,11 +38,13 @@ __lws_event_service_get_earliest_wake(struct lws_context_per_thread *pt,
 		us = t;
 		seen = 1;
 	}
+#if defined(LWS_WITH_SEQUENCER)
 	t = __lws_seq_timeout_check(pt, usnow);
 	if (t && (!seen || t < us)) {
 		us = t;
 		seen = 1;
 	}
+#endif
 
 	return us;
 }
diff --git a/lib/plat/unix/unix-service.c b/lib/plat/unix/unix-service.c
index 268f7465a..1b9b54c5e 100644
--- a/lib/plat/unix/unix-service.c
+++ b/lib/plat/unix/unix-service.c
@@ -138,12 +138,14 @@ _lws_plat_service_tsi(struct lws_context *context, int timeout_ms, int tsi)
 
 	lws_pt_unlock(pt);
 
+#if defined(LWS_WITH_SEQUENCER)
 	/*
 	 * if there are any pending sequencer events, handle the next one
 	 * for all sequencers with pending events.  If nothing to do returns
 	 * immediately.
 	 */
 	lws_pt_do_pending_sequencer_events(pt);
+#endif
 
 	m = 0;
 #if defined(LWS_ROLE_WS) && !defined(LWS_WITHOUT_EXTENSIONS)
diff --git a/minimal-examples/api-tests/api-test-lws_sequencer/CMakeLists.txt b/minimal-examples/api-tests/api-test-lws_sequencer/CMakeLists.txt
index cfb9b98ee..1d24090f5 100644
--- a/minimal-examples/api-tests/api-test-lws_sequencer/CMakeLists.txt
+++ b/minimal-examples/api-tests/api-test-lws_sequencer/CMakeLists.txt
@@ -64,6 +64,7 @@ ENDMACRO()
 set(requirements 1)
 require_lws_config(LWS_ROLE_H1 1 requirements)
 require_lws_config(LWS_WITHOUT_CLIENT 0 requirements)
+require_lws_config(LWS_WITH_SEQUENCER 1 requirements)
 
 if (requirements)
 	add_executable(${SAMP} ${SRCS})