diff --git a/SpigotCore/SpigotCore_21/src/de/steamwar/techhider/ChunkHider21.java b/SpigotCore/SpigotCore_21/src/de/steamwar/techhider/ChunkHider21.java
index 1cc6c29c..3c665457 100644
--- a/SpigotCore/SpigotCore_21/src/de/steamwar/techhider/ChunkHider21.java
+++ b/SpigotCore/SpigotCore_21/src/de/steamwar/techhider/ChunkHider21.java
@@ -90,7 +90,15 @@ public class ChunkHider21 implements ChunkHider {
     public static final Class<?> tileEntity = Reflection.getClass("net.minecraft.network.protocol.game.ClientboundLevelChunkPacketData$BlockEntityInfo");
     protected static final Reflection.Field<BlockEntityType> entityType = Reflection.getField(tileEntity, BlockEntityType.class, 0);
     private static final Class<?> builtInRegestries = Reflection.getClass("net.minecraft.core.registries.BuiltInRegistries");
-    private static final Class<?> registry = Reflection.getClass("net.minecraft.core.Registry");
+    private static final Class<?> registry;
+    static {
+        // This is needed because `Class.forName("net.minecraft.core.Registry")` resolved to net.minecraft.core.IdMap instead of the needed class!
+        try {
+            registry = Reflection.class.getClassLoader().loadClass("net.minecraft.core.Registry");
+        } catch (ClassNotFoundException e) {
+            throw new IllegalArgumentException("Cannot find net.minecraft.core.Registry", e);
+        }
+    }
     private static final Reflection.Field<?> nameField = Reflection.getField(builtInRegestries, "BLOCK_ENTITY_TYPE", registry);
     private static final Class<?> resourceLocation = Reflection.getClass("net.minecraft.resources.ResourceLocation");
     private static final Reflection.Method getKey = Reflection.getTypedMethod(registry, "getKey", resourceLocation, Object.class);