diff --git a/js/js.libraries/src/core/date.kt b/js/js.libraries/src/core/date.kt
index 409ca5c0b13..ef5ac5ae5cc 100644
--- a/js/js.libraries/src/core/date.kt
+++ b/js/js.libraries/src/core/date.kt
@@ -1,5 +1,5 @@
 package kotlin.js
 
 public external class Date() {
-    public fun getTime(): Int
+    public fun getTime(): Double
 }