diff --git a/mods/ts/rules/world.yaml b/mods/ts/rules/world.yaml
index 6fd8631aa1..a69133b65c 100644
--- a/mods/ts/rules/world.yaml
+++ b/mods/ts/rules/world.yaml
@@ -85,6 +85,7 @@ World:
 	Country@1:
 		Name: Nod
 		Race: nod
+	DomainIndex:
 	ResourceLayer:
 	ResourceClaimLayer:
 	FixedColorPalette@GreenTiberium: