diff --git a/cmd/goyacc/yacc.go b/cmd/goyacc/yacc.go
index 5e77e2f5e6..92764014c5 100644
--- a/cmd/goyacc/yacc.go
+++ b/cmd/goyacc/yacc.go
@@ -387,7 +387,7 @@ func setup() {
 	yaccpar = strings.Replace(yaccpartext, "$$", prefix, -1)
 	openup()
 
-	fmt.Fprintf(ftable, "// Code generated by goyacc. DO NOT EDIT.")
+	fmt.Fprintf(ftable, "// Code generated by goyacc %s. DO NOT EDIT.", strings.Join(os.Args[1:], " "))
 
 	defin(0, "$end")
 	extval = PRIVATE // tokens start in unicode 'private use'