diff --git a/mods/ts/rules/defaults.yaml b/mods/ts/rules/defaults.yaml
index a59a9b7372..1e71a9e6f4 100644
--- a/mods/ts/rules/defaults.yaml
+++ b/mods/ts/rules/defaults.yaml
@@ -661,6 +661,7 @@
 			Tiberium: 100
 			BlueTiberium: 100
 			Veins: 100
+		TunnelCondition: inside-tunnel
 	WithTextControlGroupDecoration:
 	SelectionDecorations:
 		Palette: pips