diff --git a/exercises/practice/hello-world/src/main/scala/HelloWorld.scala b/exercises/practice/hello-world/src/main/scala/HelloWorld.scala
index 2947179d..54684535 100644
--- a/exercises/practice/hello-world/src/main/scala/HelloWorld.scala
+++ b/exercises/practice/hello-world/src/main/scala/HelloWorld.scala
@@ -1,4 +1,4 @@
 object HelloWorld {
-  def hello() = ???
+  def hello() = "Goodbye, Mars!"
 }