diff --git a/GameRes/Utility.cs b/GameRes/Utility.cs
index f7c53052..c0ffc262 100644
--- a/GameRes/Utility.cs
+++ b/GameRes/Utility.cs
@@ -116,6 +116,18 @@ namespace GameRes.Utility
             count &= 0x1F;
             return v << count | v >> (32-count);
         }
+
+        public static byte RotByteR (byte v, int count)
+        {
+            count &= 7;
+            return (byte)(v >> count | v << (8-count));
+        }
+
+        public static byte RotByteL (byte v, int count)
+        {
+            count &= 7;
+            return (byte)(v << count | v >> (8-count));
+        }
     }
 
     public static class BigEndian