diff --git a/mods/d2k/rules/ordos.yaml b/mods/d2k/rules/ordos.yaml
index 30b20760b9..a1f871580d 100644
--- a/mods/d2k/rules/ordos.yaml
+++ b/mods/d2k/rules/ordos.yaml
@@ -288,7 +288,7 @@ DEVIATORTANK:
 	Buildable:
 		Queue: Vehicle
 		BuildPaletteOrder: 50
-		Prerequisites: heavyo
+		Prerequisites: heavyo,researcho
 		Owner: ordos
 	Mobile:
 		Speed: 6