diff --git a/packages/next/server/web/spec-extension/cookies.ts b/packages/next/server/web/spec-extension/cookies.ts
index 3d60c5499d22..f6cf48029a7b 100644
--- a/packages/next/server/web/spec-extension/cookies.ts
+++ b/packages/next/server/web/spec-extension/cookies.ts
@@ -5,8 +5,7 @@ const normalizeCookieOptions = (options: CookieSerializeOptions) => {
   options = Object.assign({}, options)
 
   if (options.maxAge) {
-    options.expires = new Date(Date.now() + options.maxAge)
-    options.maxAge /= 1000
+    options.expires = new Date(Date.now() + options.maxAge * 1000)
   }
 
   if (options.path == null) {
diff --git a/test/unit/web-runtime/cookies.test.ts b/test/unit/web-runtime/cookies.test.ts
index 7ee620cd7018..7eca76da0d45 100644
--- a/test/unit/web-runtime/cookies.test.ts
+++ b/test/unit/web-runtime/cookies.test.ts
@@ -55,7 +55,7 @@ it('.set with options', async () => {
 
   const options: CookieSerializeOptions = {
     path: '/',
-    maxAge: 1000 * 60 * 60 * 24 * 7,
+    maxAge: 60 * 60 * 24 * 7,
     httpOnly: true,
     sameSite: 'strict',
     domain: 'example.com',
@@ -65,7 +65,7 @@ it('.set with options', async () => {
 
   expect(options).toStrictEqual({
     path: '/',
-    maxAge: 1000 * 60 * 60 * 24 * 7,
+    maxAge: 60 * 60 * 24 * 7,
     httpOnly: true,
     sameSite: 'strict',
     domain: 'example.com',