diff --git a/kubejs/startup_scripts/tfg/materials.nuclear.js b/kubejs/startup_scripts/tfg/materials.nuclear.js
index 8f0cc5ffe..ae2d6be0e 100644
--- a/kubejs/startup_scripts/tfg/materials.nuclear.js
+++ b/kubejs/startup_scripts/tfg/materials.nuclear.js
@@ -1,4 +1,5 @@
 // priority: 0
+"use strict";
 
 const registerTFGNuclearMaterials = (event) => {