diff --git a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Machine/ULA.cs b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Machine/ULA.cs
index 448c7f9251..6e5132bcd6 100644
--- a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Machine/ULA.cs
+++ b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Machine/ULA.cs
@@ -1049,6 +1049,8 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
             ser.Sync("LastULATick", ref LastULATick);
             ser.Sync("ULACycleCounter", ref ULACycleCounter);
             ser.Sync("FrameEnd", ref FrameEnd);
+
+            ser.Sync("InterruptRaised", ref InterruptRaised);
             ser.EndSection();
         }
 
diff --git a/output/dll/libsnes.wbx.gz b/output/dll/libsnes.wbx.gz
index 04e04bd3f3..c644208284 100644
Binary files a/output/dll/libsnes.wbx.gz and b/output/dll/libsnes.wbx.gz differ