diff --git a/index.js b/index.js
index 3672dfc..2fe8985 100644
--- a/index.js
+++ b/index.js
@@ -162,7 +162,7 @@ Cookie.prototype.toString = function() {
 Cookie.prototype.toHeader = function() {
   var header = this.toString()
 
-  if (this.maxAge) this.expires = new Date(Date.now() + this.maxAge);
+  if (this.maxAge || 0 === this.maxAge) this.expires = new Date(Date.now() + this.maxAge);
 
   if (this.path     ) header += "; path=" + this.path
   if (this.expires  ) header += "; expires=" + this.expires.toUTCString()
diff --git a/test/cookie.js b/test/cookie.js
index 347c2e8..d20b2ce 100644
--- a/test/cookie.js
+++ b/test/cookie.js
@@ -55,6 +55,11 @@ describe('new Cookie(name, value, [options])', function () {
         var cookie = new cookies.Cookie('foo', 'bar', { maxAge: 86400 })
         assert.equal(cookie.maxage, 86400)
       })
+
+      it('should set the .maxAge property to 0', function () {
+        var cookie = new cookies.Cookie('foo', 'bar', { maxAge: 0 })
+        assert.equal(cookie.maxAge, 0)
+      })
     })
 
     describe('sameSite', function () {