From 8c26193aa6d3d1e4f446c883cb4f4c2bcb1e8e56 Mon Sep 17 00:00:00 2001
From: F K <54195004+fredjk-gh@users.noreply.github.com>
Date: Sat, 18 Dec 2021 16:21:46 -0500
Subject: [PATCH] Add missing using (#46)

Caused local build to fail after syncing to commit https://github.com/Xjph/ObservatoryCore/commit/714537e58aaeb6f2d5dbaca063bc97aad87a1ce8.
---
 .../Files/Journal/Powerplay/PowerplayVoucher.cs               | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ObservatoryFramework/Files/Journal/Powerplay/PowerplayVoucher.cs b/ObservatoryFramework/Files/Journal/Powerplay/PowerplayVoucher.cs
index d7a24d5..3c9d4f2 100644
--- a/ObservatoryFramework/Files/Journal/Powerplay/PowerplayVoucher.cs
+++ b/ObservatoryFramework/Files/Journal/Powerplay/PowerplayVoucher.cs
@@ -1,4 +1,6 @@
-namespace Observatory.Framework.Files.Journal
+using System.Collections.Immutable;
+
+namespace Observatory.Framework.Files.Journal
 {
     public class PowerplayVoucher : PowerplayJoin
     {