diff --git a/mods/ra/rules/ships.yaml b/mods/ra/rules/ships.yaml
index 50a1d8aef7..0ac6892750 100644
--- a/mods/ra/rules/ships.yaml
+++ b/mods/ra/rules/ships.yaml
@@ -92,7 +92,7 @@ DD:
 	Buildable:
 		Queue: Ship
 		BuildPaletteOrder: 70
-		Prerequisites: syrd
+		Prerequisites: syrd,dome
 		BuiltAt: syrd
 		Owner: allies
 	Valued: