diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/Mapper219.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/Mapper219.cs
index 53c335f07f..13d30b938d 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/Mapper219.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/Mapper219.cs
@@ -1,4 +1,5 @@
 using System;
+using BizHawk.Common;
 
 namespace BizHawk.Emulation.Cores.Nintendo.NES
 {
@@ -143,5 +144,16 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 			else
 				base.WritePPU(addr, value);
 		}
+
+		public override void SyncState(Serializer ser)
+		{
+			ser.Sync("exregs", ref exregs, false);
+			ser.Sync("prgregs", ref prgregs, false);
+			ser.Sync("chrregs", ref chrregs, false);
+			ser.Sync("bits_rev", ref bits_rev);
+			ser.Sync("reg_value", ref reg_value);
+
+			base.SyncState(ser);
+		}
 	}
 }