diff --git a/mods/d2k/rules/atreides.yaml b/mods/d2k/rules/atreides.yaml
index 541f1eb34a..4a608d3fab 100644
--- a/mods/d2k/rules/atreides.yaml
+++ b/mods/d2k/rules/atreides.yaml
@@ -154,7 +154,7 @@ SONICTANK:
 	Buildable:
 		Queue: Armor
 		BuildPaletteOrder: 100
-		Prerequisites: heavya,research
+		Prerequisites: heavya, researcha
 		Owner: atreides
 		Hotkey: o
 	Valued: