diff --git a/keyboards/smithrune/iron165r2_s/info.json b/keyboards/smithrune/iron165r2_s/info.json
index 31106ad0bdc..d373fa27b3d 100644
--- a/keyboards/smithrune/iron165r2_s/info.json
+++ b/keyboards/smithrune/iron165r2_s/info.json
@@ -17,11 +17,13 @@
         "console": false,
         "encoder": false,
         "extrakey": true,
-        "lto": true,
         "mousekey": false,
         "nkro": true,
         "rgblight": true
     },
+    "build": {
+        "lto": true
+    },
     "indicators": {
         "caps_lock": "A4"
     },
@@ -130,4 +132,4 @@
             ]
         }
     }
-}
\ No newline at end of file
+}