diff --git a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper045.cs b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper045.cs
index e7a95e382f..86aea39b5b 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper045.cs
+++ b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper045.cs
@@ -40,6 +40,7 @@ namespace BizHawk.Emulation.Consoles.Nintendo
 		public override void SyncState(Serializer ser)
 		{
 			ser.Sync("regs", ref regs);
+			ser.Sync("lock_regs", ref lock_regs);
 			base.SyncState(ser);
 		}