diff --git a/mods/cnc/rules/structures.yaml b/mods/cnc/rules/structures.yaml
index 41d994f189..d817346ce0 100644
--- a/mods/cnc/rules/structures.yaml
+++ b/mods/cnc/rules/structures.yaml
@@ -635,6 +635,7 @@ GUN:
 		Range: 3
 SAM:
 	Inherits: ^Building
+	RequiresPower:
 	Valued:
 		Cost: 750
 	Tooltip:
@@ -695,6 +696,7 @@ GTWR:
 	
 ATWR:
 	Inherits: ^Building
+	RequiresPower:
 	Valued:
 		Cost: 1000
 	Tooltip: