diff --git a/paper-api/src/main/java/org/bukkit/inventory/PlayerInventory.java b/paper-api/src/main/java/org/bukkit/inventory/PlayerInventory.java
index 5d75bd4950..fc5772e850 100644
--- a/paper-api/src/main/java/org/bukkit/inventory/PlayerInventory.java
+++ b/paper-api/src/main/java/org/bukkit/inventory/PlayerInventory.java
@@ -63,16 +63,20 @@ public interface PlayerInventory extends Inventory {
      * Indexes 36 through 39 refer to the armor slots. Though you can set armor with this method using these indexes,
      * you are encouraged to use the provided methods for those slots.
      * <p>
-     * If you attempt to use this method with an index less than 0 or greater than 39, an ArrayIndexOutOfBounds
+     * Index 40 refers to the off hand (shield) item slot. Though you can set off hand with this method using this index,
+     * you are encouraged to use the provided method for this slot.
+     * <p>
+     * If you attempt to use this method with an index less than 0 or greater than 40, an ArrayIndexOutOfBounds
      * exception will be thrown.
      *
      * @param index The index where to put the ItemStack
      * @param item The ItemStack to set
-     * @throws ArrayIndexOutOfBoundsException when index &lt; 0 || index &gt; 39
+     * @throws ArrayIndexOutOfBoundsException when index &lt; 0 || index &gt; 40
      * @see #setBoots(ItemStack)
      * @see #setChestplate(ItemStack)
      * @see #setHelmet(ItemStack)
      * @see #setLeggings(ItemStack)
+     * @see #setItemInOffHand(ItemStack)
      */
     @Override
     public void setItem(int index, ItemStack item);