diff --git a/roaring/roaring.go b/roaring/roaring.go
index 755e508b7..8ac2f81a1 100644
--- a/roaring/roaring.go
+++ b/roaring/roaring.go
@@ -168,7 +168,7 @@ func (b *Bitmap) Add(a ...uint64) (changed bool, err error) {
 }
 
 // DirectAdd adds values to the bitmap by bypassing the op log.
-func (b *Bitmap) DirectAdd(values []uint64) {
+func (b *Bitmap) DirectAdd(values ...uint64) {
 	for _, value := range values {
 		b.add(value)
 	}
diff --git a/roaring/roaring_test.go b/roaring/roaring_test.go
index 073b96c6f..a06e882c8 100644
--- a/roaring/roaring_test.go
+++ b/roaring/roaring_test.go
@@ -334,8 +334,8 @@ func TestBitmap_ArrayCountRange(t *testing.T) {
 func TestBitmap_DirectAdd(t *testing.T) {
 	bits := []uint64{0, 1, 2, 3, 4, 5, 12, 13, 14, 15, 16, 17, 1000000, 1000002, 1000003, 1000004, 1000005, 1000006, 1000010, 1000011, 1000012, 1000013, 1000014}
 	bm := roaring.NewBitmap()
-	bm.DirectAdd([]uint64{0, 1, 2, 3, 4, 5, 12, 13, 14, 15, 16, 17})
-	bm.DirectAdd([]uint64{1000000, 1000002, 1000003, 1000004, 1000005, 1000006, 1000010, 1000011, 1000012, 1000013, 1000014})
+	bm.DirectAdd(0, 1, 2, 3, 4, 5, 12, 13, 14, 15, 16, 17)
+	bm.DirectAdd(1000000, 1000002, 1000003, 1000004, 1000005, 1000006, 1000010, 1000011, 1000012, 1000013, 1000014)
 	if len(bits) != int(bm.Count()) {
 		t.Fatalf("count %d != %d", len(bits), bm.Count())
 	}