diff --git a/common.js b/common.js
index a9baf37..8cf5f7e 100755
--- a/common.js
+++ b/common.js
@@ -11,7 +11,8 @@ const ltsNames = {
   12: 'erbium',
   14: 'fermium',
   16: 'gallium',
-  18: 'hydrogen'
+  18: 'hydrogen',
+  20: 'iron'
 }
 
 class Linker {