diff --git a/fn/option.go b/fn/option.go
index 4d32d3e2e..f02f82c8a 100644
--- a/fn/option.go
+++ b/fn/option.go
@@ -133,11 +133,11 @@ func FlattenOption[A any](oo Option[Option[A]]) Option[A] {
 	return oo.some
 }
 
-// ChainOption transforms a function A -> Option[B] into one that accepts an
+// FlatMapOption transforms a function A -> Option[B] into one that accepts an
 // Option[A] as an argument.
 //
-// ChainOption : (A -> Option[B]) -> Option[A] -> Option[B].
-func ChainOption[A, B any](f func(A) Option[B]) func(Option[A]) Option[B] {
+// FlatMapOption : (A -> Option[B]) -> Option[A] -> Option[B].
+func FlatMapOption[A, B any](f func(A) Option[B]) func(Option[A]) Option[B] {
 	return func(o Option[A]) Option[B] {
 		if o.isSome {
 			return f(o.some)
diff --git a/fn/slice_test.go b/fn/slice_test.go
index 961196973..7269f801e 100644
--- a/fn/slice_test.go
+++ b/fn/slice_test.go
@@ -383,7 +383,7 @@ func TestPropLastTailIsLast(t *testing.T) {
 			return true
 		}
 
-		return Last(s) == ChainOption(Last[uint8])(Tail(s))
+		return Last(s) == FlatMapOption(Last[uint8])(Tail(s))
 	}
 
 	require.NoError(t, quick.Check(f, nil))
@@ -396,7 +396,7 @@ func TestPropHeadInitIsHead(t *testing.T) {
 			return true
 		}
 
-		return Head(s) == ChainOption(Head[uint8])(Init(s))
+		return Head(s) == FlatMapOption(Head[uint8])(Init(s))
 	}
 
 	require.NoError(t, quick.Check(f, nil))