diff --git a/docs/_docs/reference/dropped-features/nonlocal-returns.md b/docs/_docs/reference/dropped-features/nonlocal-returns.md
index aa5245159b41..3a8044d22663 100644
--- a/docs/_docs/reference/dropped-features/nonlocal-returns.md
+++ b/docs/_docs/reference/dropped-features/nonlocal-returns.md
@@ -25,3 +25,5 @@ extension [T](xs: List[T])
   val xs = List(1, 2, 3, 4, 5)
   assert(xs.has(2) == xs.contains(2))
 ```
+
+Note: compiler produces deprecation error on nonlocal returns only with `-source:future` option.