diff --git a/lualib/resty/kong/upstream.lua b/lualib/resty/kong/upstream.lua
index 7781a7bb..41df826d 100644
--- a/lualib/resty/kong/upstream.lua
+++ b/lualib/resty/kong/upstream.lua
@@ -20,7 +20,7 @@ base.allows_subsystem("http")
 
 ffi.cdef([[
 int
-ngx_http_lua_ffi_set_upstream_next(ngx_http_request_t *r, uint32_t next_upstream, char **err);
+ngx_http_lua_ffi_set_next_upstream(ngx_http_request_t *r, uint32_t next_upstream, char **err);
 ]])
 
 local type = type
@@ -46,7 +46,7 @@ local next_upstream_table = {
 	non_idempotent = 0x00004000,
 }
 
-function _M.set_upstream_next(...)
+function _M.set_next_upstream(...)
 	local nargs = select("#", ...)
 	if nargs == 0 then
 		return "no argument"
@@ -74,7 +74,7 @@ function _M.set_upstream_next(...)
 	end
 
 	local err = ffi.new("char *[1]")
-	local rc = C.ngx_http_lua_ffi_set_upstream_next(r, next_upstream, err)
+	local rc = C.ngx_http_lua_ffi_set_next_upstream(r, next_upstream, err)
 
 	if rc ~= NGX_OK then
 		return "failed to set upstream next: " .. ffi_str(err[0])
diff --git a/src/ngx_http_lua_kong_module.c b/src/ngx_http_lua_kong_module.c
index 44eee728..f5484d35 100644
--- a/src/ngx_http_lua_kong_module.c
+++ b/src/ngx_http_lua_kong_module.c
@@ -218,7 +218,7 @@ ngx_http_lua_kong_get_next_upstream_mask(ngx_http_request_t *r,
 }
 
 int
-ngx_http_lua_ffi_set_upstream_next(ngx_http_request_t *r, ngx_uint_t next_upstream, char **err)
+ngx_http_lua_ffi_set_next_upstream(ngx_http_request_t *r, ngx_uint_t next_upstream, char **err)
 {
     ngx_http_lua_kong_ctx_t      *ctx;
 
diff --git a/t/013-upstream.t b/t/013-upstream.t
index 9bca0c7f..4d07677c 100644
--- a/t/013-upstream.t
+++ b/t/013-upstream.t
@@ -162,7 +162,7 @@ __DATA__
 --- response_body eval
 ["this is backend peer \$TEST_NGINX_RAND_PORT_4", "this is backend peer \$TEST_NGINX_RAND_PORT_4"]
 
-=== TEST 3: lua resty.kong.upstream.set_upstream_next() behavior
+=== TEST 3: lua resty.kong.upstream.set_next_upstream() behavior
 --- http_config
     upstream balancer {
         server 127.0.0.1;
@@ -228,7 +228,7 @@ __DATA__
 --- config
     access_by_lua_block {
         local upstream = require "resty.kong.upstream"
-        local err = upstream.set_upstream_next("error", "timeout", "http_500", "http_502", "http_503", "http_504", "http_404", "http_403", "http_429", "non_idempotent", "bala")
+        local err = upstream.set_next_upstream("error", "timeout", "http_500", "http_502", "http_503", "http_504", "http_404", "http_403", "http_429", "non_idempotent", "bala")
         if err then
             ngx.log(ngx.ERR, "failed to set upstream next: ", err)
             return ngx.exit(503)