diff --git a/sys/tools/fw_stub.awk b/sys/tools/fw_stub.awk
index 1c4827ec228e..ea9f6ab8cd9b 100644
--- a/sys/tools/fw_stub.awk
+++ b/sys/tools/fw_stub.awk
@@ -123,8 +123,10 @@ ctmpfilename = cfilename ".tmp";
 modname = opt_m;
 gsub(/[-\.]/, "_", modname);
 
+# Avoid a literal generated file tag here.
+generated = "@" "generated";
 printc("/*\
- * Automatically generated by:\
+ * Automatically " generated " by:\
  * $FreeBSD$\
  */");
 printc("#include <sys/param.h>");