diff --git a/BauSystem_15/src/de/steamwar/bausystem/utils/PlaceItemWrapper15.java b/BauSystem_15/src/de/steamwar/bausystem/utils/PlaceItemWrapper15.java
index d0828173..c945351a 100644
--- a/BauSystem_15/src/de/steamwar/bausystem/utils/PlaceItemWrapper15.java
+++ b/BauSystem_15/src/de/steamwar/bausystem/utils/PlaceItemWrapper15.java
@@ -29,9 +29,13 @@ public class PlaceItemWrapper15 implements PlaceItemWrapper {
             if (material.isLegacy()) continue;
 
             String nonWall = material.name().replace("_WALL_", "").replace("WALL_", "").replace("_WALL", "");
-            Material nonWallMaterial = Material.valueOf(nonWall);
-            if (nonWallMaterial != material) {
-                BLOCK_MATERIAL_TO_WALL_BLOCK_MATERIAL.put(nonWallMaterial, material);
+            try {
+                Material nonWallMaterial = Material.valueOf(nonWall);
+                if (nonWallMaterial != material) {
+                    BLOCK_MATERIAL_TO_WALL_BLOCK_MATERIAL.put(nonWallMaterial, material);
+                }
+            } catch (Exception e) {
+                // Ignore
             }
         }
         ITEM_MATERIAL_TO_BLOCK_MATERIAL.put(Material.REDSTONE, Material.REDSTONE_WIRE);