diff --git a/src/main/java/org/bukkit/Material.java b/src/main/java/org/bukkit/Material.java
index 19bd712a..cd6cb731 100644
--- a/src/main/java/org/bukkit/Material.java
+++ b/src/main/java/org/bukkit/Material.java
@@ -747,8 +747,10 @@ public enum Material {
             case SOIL:
             case FURNACE:
             case BURNING_FURNACE:
+            case SIGN_POST:
             case WOODEN_DOOR:
             case COBBLESTONE_STAIRS:
+            case WALL_SIGN:
             case STONE_PLATE:
             case IRON_DOOR_BLOCK:
             case WOOD_PLATE: