diff --git a/ArcFormats/ImageDRG.cs b/ArcFormats/ImageDRG.cs
index 8d99b33b..dc8246ec 100644
--- a/ArcFormats/ImageDRG.cs
+++ b/ArcFormats/ImageDRG.cs
@@ -31,6 +31,7 @@ using System.Text;
 using System.Windows;
 using System.Windows.Media;
 using System.Windows.Media.Imaging;
+using GameRes.Utility;
 
 namespace GameRes.Formats.DRS
 {
diff --git a/ArcFormats/ImageRCT.cs b/ArcFormats/ImageRCT.cs
index 27b4545f..63745c81 100644
--- a/ArcFormats/ImageRCT.cs
+++ b/ArcFormats/ImageRCT.cs
@@ -33,6 +33,7 @@ using System.Windows;
 using System.Windows.Media;
 using System.Windows.Media.Imaging;
 using GameRes.Formats.Strings;
+using GameRes.Utility;
 
 namespace GameRes.Formats.Majiro
 {