diff --git a/linht-hw.kicad_pro b/linht-hw.kicad_pro
index cf485c3..004bd65 100644
--- a/linht-hw.kicad_pro
+++ b/linht-hw.kicad_pro
@@ -453,6 +453,7 @@
       "single_global_label": "ignore",
       "unannotated": "error",
       "unconnected_wire_endpoint": "warning",
+      "undefined_netclass": "error",
       "unit_value_mismatch": "error",
       "unresolved_variable": "error",
       "wire_dangling": "error"