diff --git a/api/memo.go b/api/memo.go
index 32e53835f..b34403d78 100644
--- a/api/memo.go
+++ b/api/memo.go
@@ -46,7 +46,8 @@ type Memo struct {
 
 type MemoCreate struct {
 	// Standard fields
-	CreatorID int `json:"-"`
+	CreatorID int    `json:"-"`
+	CreatedTs *int64 `json:"createdTs"`
 
 	// Domain specific fields
 	Visibility Visibility `json:"visibility"`
diff --git a/store/memo.go b/store/memo.go
index 4b1900be3..469491e63 100644
--- a/store/memo.go
+++ b/store/memo.go
@@ -217,6 +217,10 @@ func createMemoRaw(ctx context.Context, tx *sql.Tx, create *api.MemoCreate) (*me
 	args := []interface{}{create.CreatorID, create.Content, create.Visibility}
 	placeholder := []string{"?", "?", "?"}
 
+	if v := create.CreatedTs; v != nil {
+		set, args, placeholder = append(set, "created_ts"), append(args, *v), append(placeholder, "?")
+	}
+
 	query := `
 		INSERT INTO memo (
 			` + strings.Join(set, ", ") + `