diff --git a/src/main/java/io/github/thebusybiscuit/extraheads/listeners/HeadListener.java b/src/main/java/io/github/thebusybiscuit/extraheads/listeners/HeadListener.java
index 67eb2a5..57065c5 100644
--- a/src/main/java/io/github/thebusybiscuit/extraheads/listeners/HeadListener.java
+++ b/src/main/java/io/github/thebusybiscuit/extraheads/listeners/HeadListener.java
@@ -49,7 +49,7 @@ private double getChance(@Nonnull EntityType type, @Nullable Player killer) {
 
         ItemStack item = killer.getInventory().getItemInMainHand();
         SwordOfBeheading sword = (SwordOfBeheading) SlimefunItems.SWORD_OF_BEHEADING.getItem();
-        if (item.isEmpty() || !sword.isItem(item) || sword.isDisabledIn(killer.getWorld())) {
+        if (item.isEmpty() || sword == null || !sword.isItem(item) || sword.isDisabledIn(killer.getWorld())) {
             return chance;
         }