diff --git a/OpenRA.Utility/UpgradeRules.cs b/OpenRA.Utility/UpgradeRules.cs
index 7105d21b51..73ac70061e 100644
--- a/OpenRA.Utility/UpgradeRules.cs
+++ b/OpenRA.Utility/UpgradeRules.cs
@@ -222,6 +222,16 @@ namespace OpenRA.Utility
 					}
 				}
 
+				// "disabled" palette overlay has been moved into it's own DisabledOverlay trait
+				if (engineVersion < 20140305)
+				{
+					if (node.Value.Nodes.Any(n => n.Key.StartsWith("RequiresPower"))
+						&& !node.Value.Nodes.Any(n => n.Key.StartsWith("DisabledOverlay")))
+					{
+						node.Value.Nodes.Add(new MiniYamlNode("DisabledOverlay", new MiniYaml("")));
+					}
+				}
+
 				// ChronoshiftDeploy was replaced with PortableChrono
 				if (engineVersion < 20140321)
 				{
diff --git a/mods/cnc/rules/structures.yaml b/mods/cnc/rules/structures.yaml
index e32218487b..8641a294a9 100644
--- a/mods/cnc/rules/structures.yaml
+++ b/mods/cnc/rules/structures.yaml
@@ -543,7 +543,6 @@ GUN:
 
 SAM:
 	Inherits: ^Building
-	RequiresPower:
 	Valued:
 		Cost: 750
 	CustomBuildTimeValue:
@@ -560,6 +559,8 @@ SAM:
 		Power: -20
 		Footprint: xx
 		Dimensions: 2,1
+	RequiresPower:
+	DisabledOverlay:
 	-GivesBuildableArea:
 	Health:
 		HP: 400
@@ -581,7 +582,6 @@ SAM:
 	RenderRangeCircle:
 
 OBLI:
-	RequiresPower:
 	Inherits: ^Building
 	Valued:
 		Cost: 1500
@@ -599,6 +599,8 @@ OBLI:
 		Power: -150
 		Footprint: _ x
 		Dimensions: 1,2
+	RequiresPower:
+	DisabledOverlay:
 	-GivesBuildableArea:
 	Health:
 		HP: 600
@@ -666,7 +668,6 @@ GTWR:
 
 ATWR:
 	Inherits: ^Building
-	RequiresPower:
 	Valued:
 		Cost: 1000
 	CustomBuildTimeValue:
@@ -683,6 +684,8 @@ ATWR:
 		Power: -40
 		Footprint: _ x
 		Dimensions: 1,2
+	RequiresPower:
+	DisabledOverlay:
 	-GivesBuildableArea:
 	Health:
 		HP: 600