diff --git a/AnarchyExploitFixesLegacy/src/main/java/me/moomoo/anarchyexploitfixes/modules/patches/BookBan.java b/AnarchyExploitFixesLegacy/src/main/java/me/moomoo/anarchyexploitfixes/modules/patches/BookBan.java
index 1e346d9a7..f0f418fc1 100644
--- a/AnarchyExploitFixesLegacy/src/main/java/me/moomoo/anarchyexploitfixes/modules/patches/BookBan.java
+++ b/AnarchyExploitFixesLegacy/src/main/java/me/moomoo/anarchyexploitfixes/modules/patches/BookBan.java
@@ -58,7 +58,7 @@ private long getItemSize(ItemStack stack) {
             if (itemMeta instanceof BlockStateMeta) {
                 final BlockStateMeta blockStateMeta = (BlockStateMeta) itemMeta;
                 if (blockStateMeta.getBlockState() instanceof ShulkerBox) {
-                    byteSize += getInventorySize(((ShulkerBox) blockStateMeta).getInventory().getContents());
+                    byteSize += getInventorySize(((ShulkerBox) blockStateMeta.getBlockState()).getInventory().getContents());
                 }
             }
         }