diff --git a/SabreTools.Helper/Dats/Partials/DatFile.Writers.cs b/SabreTools.Helper/Dats/Partials/DatFile.Writers.cs
index 322590a5..ef5980ef 100644
--- a/SabreTools.Helper/Dats/Partials/DatFile.Writers.cs
+++ b/SabreTools.Helper/Dats/Partials/DatFile.Writers.cs
@@ -481,6 +481,7 @@ namespace SabreTools.Helper.Dats
 								(rom.Machine.MachineType == MachineType.Bios ? " isbios=\"yes\"" : "") +
 								(rom.Machine.MachineType == MachineType.Device ? " isdevice=\"yes\"" : "") +
 								(rom.Machine.MachineType == MachineType.Mechanical ? " ismechanical=\"yes\"" : "") +
+								(rom.Machine.Runnable ? " runnable=\"yes\"" : "") +
 								(ExcludeOf ? "" :
 									(String.IsNullOrEmpty(rom.Machine.CloneOf) || (rom.Machine.Name.ToLowerInvariant() == rom.Machine.CloneOf.ToLowerInvariant())
 										? ""