diff --git a/scalajslib/src/ScalaJSModule.scala b/scalajslib/src/ScalaJSModule.scala
index 37d0cec9622..fb13ac6e0ec 100644
--- a/scalajslib/src/ScalaJSModule.scala
+++ b/scalajslib/src/ScalaJSModule.scala
@@ -197,7 +197,9 @@ trait ScalaJSModule extends scalalib.ScalaModule { outer =>
 
   def moduleKind: T[ModuleKind] = T { ModuleKind.NoModule }
 
-  def useECMAScript2015: T[Boolean] = false
+  def useECMAScript2015: T[Boolean] = T { 
+    !scalaJSVersion().startsWith("0.")
+  }
 
   @internal
   override def bspBuildTargetData: Task[Option[(String, AnyRef)]] = T.task {