diff --git a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/MMC3.cs b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/MMC3.cs
index 4254c7d055..ec11545c8d 100644
--- a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/MMC3.cs
+++ b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/MMC3.cs
@@ -149,6 +149,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 			ser.Sync(nameof(irq_reload_flag), ref irq_reload_flag);
 			ser.Sync(nameof(wram_enable), ref wram_enable);
 			ser.Sync(nameof(wram_write_protect), ref wram_write_protect);
+			ser.Sync(nameof(cmd), ref cmd);
 			Sync();
 		}