diff --git a/rootfs/etc/nginx/lua/balancer/sticky.lua b/rootfs/etc/nginx/lua/balancer/sticky.lua
index 1b82e5efd8..3e542fe95c 100644
--- a/rootfs/etc/nginx/lua/balancer/sticky.lua
+++ b/rootfs/etc/nginx/lua/balancer/sticky.lua
@@ -52,7 +52,6 @@ local function set_cookie(self, value)
     key = self.cookie_name,
     value = value,
     path = cookie_path,
-    domain = ngx.var.host,
     httponly = true,
     secure = ngx.var.https == "on",
   }
diff --git a/rootfs/etc/nginx/lua/test/balancer/sticky_test.lua b/rootfs/etc/nginx/lua/test/balancer/sticky_test.lua
index d1dc969396..8b9741d3f6 100644
--- a/rootfs/etc/nginx/lua/test/balancer/sticky_test.lua
+++ b/rootfs/etc/nginx/lua/test/balancer/sticky_test.lua
@@ -119,7 +119,7 @@ describe("Sticky", function()
               local expected_len = #util[test_backend_hash_fn .. "_digest"]("anything")
               assert.equal(#payload.value, expected_len)
               assert.equal(payload.path, ngx.var.location_path)
-              assert.equal(payload.domain, ngx.var.host)
+              assert.equal(payload.domain, nil)
               assert.equal(payload.httponly, true)
               assert.equal(payload.secure, false)
               return true, nil
@@ -148,7 +148,7 @@ describe("Sticky", function()
               local expected_len = #util[test_backend_hash_fn .. "_digest"]("anything")
               assert.equal(#payload.value, expected_len)
               assert.equal(payload.path, ngx.var.location_path)
-              assert.equal(payload.domain, ngx.var.host)
+              assert.equal(payload.domain, nil)
               assert.equal(payload.httponly, true)
               assert.equal(payload.secure, true)
               return true, nil