diff --git a/mods/d2k/rules/structures.yaml b/mods/d2k/rules/structures.yaml
index 4836f8ee32..e3ff0372f3 100644
--- a/mods/d2k/rules/structures.yaml
+++ b/mods/d2k/rules/structures.yaml
@@ -602,7 +602,7 @@ RESEARCH:
 	Health:
 		HP: 2000
 	Armor:
-		Type: Concrete
+		Type: Wood
 	RevealsShroud:
 		Range: 8
 	RenderDetectionCircle: