diff --git a/mods/d2k/rules/infantry.yaml b/mods/d2k/rules/infantry.yaml
index b995e63974..5070438747 100644
--- a/mods/d2k/rules/infantry.yaml
+++ b/mods/d2k/rules/infantry.yaml
@@ -198,7 +198,7 @@ sardaukar:
 	Buildable:
 		Queue: Infantry
 		BuildPaletteOrder: 80
-		Prerequisites: ~barracks.harkonnen, palace, ~techlevel.high
+		Prerequisites: ~barracks.harkonnen, upgrade.barracks, high_tech_factory, ~techlevel.high
 		BuildDuration: 81
 		BuildDurationModifier: 40
 	Valued: