diff --git a/rootfs/etc/nginx/lua/balancer/sticky.lua b/rootfs/etc/nginx/lua/balancer/sticky.lua
index 15f3f3971..c61cef446 100644
--- a/rootfs/etc/nginx/lua/balancer/sticky.lua
+++ b/rootfs/etc/nginx/lua/balancer/sticky.lua
@@ -47,7 +47,6 @@ local function set_cookie(self, value)
     httponly = true,
   }
 
-  local expires
   if self.cookie_expires and self.cookie_expires ~= "" then
       cookie_data.expires = ngx.cookie_time(tonumber(self.cookie_expires))
   end
diff --git a/rootfs/etc/nginx/lua/test/balancer/sticky_test.lua b/rootfs/etc/nginx/lua/test/balancer/sticky_test.lua
index c38773885..9c022d9c1 100644
--- a/rootfs/etc/nginx/lua/test/balancer/sticky_test.lua
+++ b/rootfs/etc/nginx/lua/test/balancer/sticky_test.lua
@@ -157,4 +157,4 @@ describe("Sticky", function()
       end)
     end)
   end)
-end)
\ No newline at end of file
+end)