add default nettype none
diff --git a/verilog/rtl/user_project_wrapper.v b/verilog/rtl/user_project_wrapper.v
index 488e4cc..549353e 100644
--- a/verilog/rtl/user_project_wrapper.v
+++ b/verilog/rtl/user_project_wrapper.v
@@ -1,3 +1,4 @@
+`default_nettype none
 /*
  *-------------------------------------------------------------
  *