diff --git a/lualib-src/lua-cluster.c b/lualib-src/lua-cluster.c
index 29ebb08a..8ba1b7d6 100644
--- a/lualib-src/lua-cluster.c
+++ b/lualib-src/lua-cluster.c
@@ -203,7 +203,7 @@ lunpackresponse(lua_State *L) {
 }
 
 int
-luaopen_cluster_c(lua_State *L) {
+luaopen_cluster_core(lua_State *L) {
 	luaL_Reg l[] = {
 		{ "packrequest", lpackrequest },
 		{ "unpackrequest", lunpackrequest },
diff --git a/lualib-src/lua-multicast.c b/lualib-src/lua-multicast.c
index 25b9d936..866821d4 100644
--- a/lualib-src/lua-multicast.c
+++ b/lualib-src/lua-multicast.c
@@ -149,7 +149,7 @@ mc_nextid(lua_State *L) {
 }
 
 int
-luaopen_multicast_c(lua_State *L) {
+luaopen_multicast_core(lua_State *L) {
 	luaL_Reg l[] = {
 		{ "pack", mc_packlocal },
 		{ "unpack", mc_unpacklocal },
diff --git a/lualib/mqueue.lua b/lualib/mqueue.lua
index f21921ca..13c2f327 100644
--- a/lualib/mqueue.lua
+++ b/lualib/mqueue.lua
@@ -1,7 +1,7 @@
 -- This is a deprecated module, use skynet.queue instead.
 
 local skynet = require "skynet"
-local c = require "skynet.c"
+local c = require "skynet.core"
 
 local mqueue = {}
 local init_once
diff --git a/lualib/multicast.lua b/lualib/multicast.lua
index 502f8d21..1f5fbd15 100644
--- a/lualib/multicast.lua
+++ b/lualib/multicast.lua
@@ -1,5 +1,5 @@
 local skynet = require "skynet"
-local mc = require "multicast.c"
+local mc = require "multicast.core"
 
 local multicastd
 local multicast = {}
diff --git a/service/clusterd.lua b/service/clusterd.lua
index f7a9e90f..3032784e 100644
--- a/service/clusterd.lua
+++ b/service/clusterd.lua
@@ -1,7 +1,7 @@
 local skynet = require "skynet"
 local sc = require "socketchannel"
 local socket = require "socket"
-local cluster = require "cluster.c"
+local cluster = require "cluster.core"
 
 local config_name = skynet.getenv "cluster"
 local node_address = {}
diff --git a/service/multicastd.lua b/service/multicastd.lua
index dba56359..5a7f9d2a 100644
--- a/service/multicastd.lua
+++ b/service/multicastd.lua
@@ -1,5 +1,5 @@
 local skynet = require "skynet"
-local mc = require "multicast.c"
+local mc = require "multicast.core"
 local datacenter = require "datacenter"
 
 local harbor_id = skynet.harbor(skynet.self())
diff --git a/service/snaxd.lua b/service/snaxd.lua
index 28caefce..0ff9baa0 100644
--- a/service/snaxd.lua
+++ b/service/snaxd.lua
@@ -1,5 +1,5 @@
 local skynet = require "skynet"
-local c = require "skynet.c"
+local c = require "skynet.core"
 local snax_interface = require "snax.interface"
 local profile = require "profile"
 local snax = require "snax"