diff --git a/src/plugin/duration/index.js b/src/plugin/duration/index.js
index 854c746..4e89464 100644
--- a/src/plugin/duration/index.js
+++ b/src/plugin/duration/index.js
@@ -61,6 +61,10 @@ class Duration {
   constructor(input, unit, locale) {
     this.$d = {}
     this.$l = locale
+    if (input === undefined) {
+      this.$ms = 0
+      this.parseFromMilliseconds()
+    }
     if (unit) {
       return wrapper(input * unitToMS[prettyUnit(unit)], this)
     }
diff --git a/test/plugin/duration.test.js b/test/plugin/duration.test.js
index b8d6378..cca1a82 100644
--- a/test/plugin/duration.test.js
+++ b/test/plugin/duration.test.js
@@ -17,6 +17,10 @@ afterEach(() => {
 })
 
 describe('Creating', () => {
+  it('no argument', () => {
+    expect(dayjs.duration().toISOString()).toBe('P0D')
+    expect(dayjs.duration().asMilliseconds()).toBe(0)
+  })
   it('milliseconds', () => {
     expect(dayjs.duration(1, 'ms').toISOString()).toBe('PT0.001S')
     expect(dayjs.duration(100).toISOString()).toBe('PT0.1S')