diff --git a/3rd/lua/makefile b/3rd/lua/makefile
index f4a945b6..2b5f76f7 100644
--- a/3rd/lua/makefile
+++ b/3rd/lua/makefile
@@ -30,7 +30,7 @@ CMCFLAGS=
 
 # == END OF USER SETTINGS -- NO NEED TO CHANGE ANYTHING BELOW THIS LINE =======
 
-PLATS= guess aix bsd c89 freebsd generic ios linux macosx mingw posix solaris
+PLATS= guess aix bsd c89 freebsd generic ios linux macosx mingw posix solaris openbsd
 
 LUA_A=	liblua.a
 CORE_O=	lapi.o lcode.o lctype.o ldebug.o ldo.o ldump.o lfunc.o lgc.o llex.o lmem.o lobject.o lopcodes.o lparser.o lstate.o lstring.o ltable.o ltm.o lundump.o lvm.o lzio.o
@@ -112,7 +112,7 @@ c89:
 	@echo '*** with LUA_USE_C89 to ensure consistency'
 	@echo ''
 
-FreeBSD NetBSD OpenBSD freebsd:
+FreeBSD NetBSD OpenBSD freebsd openbsd:
 	$(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_LINUX -DLUA_USE_READLINE -I/usr/include/edit" SYSLIBS="-Wl,-E -ledit" CC="cc"
 
 generic: $(ALL)
diff --git a/README.md b/README.md
index 259b8b13..dbc45605 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ For Linux, install autoconf first for jemalloc:
 ```
 git clone https://github.com/cloudwu/skynet.git
 cd skynet
-make 'PLATFORM'  # PLATFORM can be linux, macosx, freebsd now
+make 'PLATFORM'  # PLATFORM can be linux, macosx, freebsd, openbsd now
 ```
 
 Or:
diff --git a/platform.mk b/platform.mk
index d95c45ad..6f041595 100644
--- a/platform.mk
+++ b/platform.mk
@@ -1,5 +1,5 @@
 PLAT ?= none
-PLATS = linux freebsd macosx mingw
+PLATS = linux freebsd openbsd macosx mingw
 
 CC ?= gcc
 
@@ -25,6 +25,7 @@ EXPORT := -Wl,-E
 linux : PLAT = linux
 macosx : PLAT = macosx
 freebsd : PLAT = freebsd
+openbsd : PLAT = openbsd
 mingw : PLAT = mingw
 
 macosx : SHARED := -fPIC -dynamiclib -Wl,-undefined,dynamic_lookup
@@ -34,10 +35,10 @@ linux freebsd : SKYNET_LIBS += -lrt
 
 # Turn off jemalloc and malloc hook on macosx
 
-macosx : MALLOC_STATICLIB :=
-macosx : SKYNET_DEFINES :=-DNOUSE_JEMALLOC
+openbsd macosx : MALLOC_STATICLIB :=
+openbsd macosx : SKYNET_DEFINES :=-DNOUSE_JEMALLOC
 
-linux macosx freebsd :
+linux macosx freebsd openbsd :
 	$(MAKE) all PLAT=$@ SKYNET_LIBS="$(SKYNET_LIBS)" SHARED="$(SHARED)" EXPORT="$(EXPORT)" MALLOC_STATICLIB="$(MALLOC_STATICLIB)" SKYNET_DEFINES="$(SKYNET_DEFINES)"
 
 mingw :
diff --git a/skynet-src/socket_server.c b/skynet-src/socket_server.c
index 8b7c4bd8..8cc6ee36 100644
--- a/skynet-src/socket_server.c
+++ b/skynet-src/socket_server.c
@@ -6,6 +6,7 @@
 #include "spinlock.h"
 
 #include <sys/types.h>
+#include <sys/select.h>
 #include <sys/socket.h>
 #include <netinet/tcp.h>
 #include <unistd.h>