diff --git a/iterator/set.go b/iterator/set.go
index f2156c5..75b3a4d 100644
--- a/iterator/set.go
+++ b/iterator/set.go
@@ -41,7 +41,7 @@ func (s *Set[T]) Len() int {
 }
 
 func (s *Set[T]) All() iter.Seq[T] {
-	return s.FilterMap(func(t T) bool {
+	return s.FilterMap(func(T) bool {
 		return true
 	})
 }