diff --git a/BizHawk.Emulation/Computers/Commodore64/MOS/Port.cs b/BizHawk.Emulation/Computers/Commodore64/MOS/Port.cs
index 4b26076e20..1e479913ea 100644
--- a/BizHawk.Emulation/Computers/Commodore64/MOS/Port.cs
+++ b/BizHawk.Emulation/Computers/Commodore64/MOS/Port.cs
@@ -10,7 +10,7 @@ namespace BizHawk.Emulation.Computers.Commodore64.MOS
 		static public byte CPUWrite(byte latch, byte val, byte dir)
 		{
 			byte result;
-			result = (byte)(latch & (byte)(dir ^ 0xFF));
+			result = (byte)(latch & (dir ^ 0xFF));
 			result |= (byte)(val & dir);
 			return result;
 		}
@@ -19,7 +19,7 @@ namespace BizHawk.Emulation.Computers.Commodore64.MOS
 		{
 			byte result;
 			result = (byte)(latch & dir);
-			result |= (byte)(val & (byte)(dir ^ 0xFF));
+			result |= (byte)(val & (dir ^ 0xFF));
 			return result;
 		}