diff --git a/mods/Neutronium Mod.js b/mods/Neutronium Mod.js
index e771d14b..ceb87436 100644
--- a/mods/Neutronium Mod.js	
+++ b/mods/Neutronium Mod.js	
@@ -660,7 +660,8 @@ behavior: [
 "XX|XX|XX",
 "XX|CR:wall|XX",
 ],
-state: solid
+state: solid,
+category: "structures"
 };
 /* Unfinished:
 magnesium