diff --git a/mods/ra/rules/structures.yaml b/mods/ra/rules/structures.yaml
index f19ec9e331..04dd5a0ca3 100644
--- a/mods/ra/rules/structures.yaml
+++ b/mods/ra/rules/structures.yaml
@@ -240,7 +240,7 @@ PDOX:
 	Buildable:
 		Queue: Defense
 		BuildPaletteOrder: 120
-		Prerequisites: atek
+		Prerequisites: atek, ~structures.allies
 		BuildLimit: 1
 		Hotkey: o
 	Valued: