diff --git a/arclight-common/src/main/java/io/izzel/arclight/common/mixin/bukkit/MaterialMixin.java b/arclight-common/src/main/java/io/izzel/arclight/common/mixin/bukkit/MaterialMixin.java
index 931cf906..48e623c5 100644
--- a/arclight-common/src/main/java/io/izzel/arclight/common/mixin/bukkit/MaterialMixin.java
+++ b/arclight-common/src/main/java/io/izzel/arclight/common/mixin/bukkit/MaterialMixin.java
@@ -222,7 +222,7 @@ public abstract class MaterialMixin implements MaterialBridge {
 
     @Inject(method = "getMaxDurability", cancellable = true, at = @At("HEAD"))
     private void arclight$getMaxDurability(CallbackInfoReturnable<Short> cir) {
-        if (arclight$spec != null) {
+        if (arclight$spec != null && arclight$spec.maxDurability != null) {
             cir.setReturnValue(arclight$spec.maxDurability.shortValue());
         }
     }