diff --git a/core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_13to1_13_1/packets/InventoryPackets.java b/core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_13to1_13_1/packets/InventoryPackets.java
index d9cdcce1..f1f94122 100644
--- a/core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_13to1_13_1/packets/InventoryPackets.java
+++ b/core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_13to1_13_1/packets/InventoryPackets.java
@@ -121,6 +121,7 @@ public class InventoryPackets {
         item.setId((short) getOldItemId(item.getId()));
     }
 
+    //1.13.1 Item Id
     public static int getNewItemId(int itemId) {
         if (itemId >= 443) {
             return itemId + 5;
@@ -133,6 +134,7 @@ public class InventoryPackets {
         item.setId((short) getNewItemId(item.getId()));
     }
 
+    //1.13 Item Id
     public static int getOldItemId(int newId) {
         if (newId >= 448) {
             return newId - 5;