diff --git a/lualib/resty/events/utils.lua b/lualib/resty/events/utils.lua
index c49c828..947e9ee 100644
--- a/lualib/resty/events/utils.lua
+++ b/lualib/resty/events/utils.lua
@@ -3,7 +3,7 @@ local str_sub = string.sub
 
 local ngx = ngx -- luacheck: ignore
 local ngx_worker_id = ngx.worker.id
-local ngx_worker_count = ngx.worker.count()
+local ngx_worker_count = ngx.worker.count
 
 
 local function is_timeout(err)