diff --git a/slices/slice.go b/slices/slice.go
index 85ebb7e..bd16f55 100644
--- a/slices/slice.go
+++ b/slices/slice.go
@@ -437,10 +437,12 @@ func Same[S ~[]T, T comparable](items S) bool {
 	return true
 }
 
-// Shuffle in random order arr elements
-func Shuffle[S ~[]T, T any](items S, seed int64) S {
+// Shuffle in random order the given elements
+//
+// This is an in-place operation, it modifies the passed slice.
+func Shuffle[S ~[]T, T any](items S, seed int64) {
 	if len(items) <= 1 {
-		return items
+		return
 	}
 	if seed == 0 {
 		seed = time.Now().UnixNano()
@@ -450,7 +452,6 @@ func Shuffle[S ~[]T, T any](items S, seed int64) S {
 		items[i], items[j] = items[j], items[i]
 	}
 	rand.Shuffle(len(items), swap)
-	return items
 }
 
 // Sort returns sorted slice
diff --git a/slices/slice_test.go b/slices/slice_test.go
index 489403d..7ac1f95 100644
--- a/slices/slice_test.go
+++ b/slices/slice_test.go
@@ -376,8 +376,8 @@ func TestSame(t *testing.T) {
 func TestShuffle(t *testing.T) {
 	is := is.New(t)
 	f := func(given []int, seed int64, expected []int) {
-		actual := slices.Shuffle(given, seed)
-		is.Equal(expected, actual)
+		slices.Shuffle(given, seed)
+		is.Equal(given, expected)
 	}
 	f([]int{}, 0, []int{})
 	f([]int{1}, 0, []int{1})