diff --git a/map.go b/map.go
index c72559b..332ef5c 100644
--- a/map.go
+++ b/map.go
@@ -1,5 +1,11 @@
 package lambda
 
+func MapNil[T any](xs []T, fx func(T)) {
+	for _, v := range xs {
+		fx(v)
+	}
+}
+
 func Map[T any](xs []T, fx func(T) T) []T {
 	for i, v := range xs {
 		xs[i] = fx(v)