diff --git a/plugins/core.js b/plugins/core.js
index 9e59cb8..955477f 100644
--- a/plugins/core.js
+++ b/plugins/core.js
@@ -72,7 +72,7 @@ function inject(bot) {
     });
 
     bot._client.on('multi_block_change', (packet) => {
-      if (core.isCore(packet.chunkCoordinates)) fillCore();
+      if (core.start===packet.chunkCoordinates || core.end===packet.chunkCoordinates) fillCore();
     });
 
     bot.on('position', fillCore);