diff --git a/cmd/goyacc/yacc.go b/cmd/goyacc/yacc.go
index 592e551c02..a637386f92 100644
--- a/cmd/goyacc/yacc.go
+++ b/cmd/goyacc/yacc.go
@@ -1272,7 +1272,7 @@ l1:
 func cpyact(curprod []int, max int) {
 
 	if !lflag {
-		fmt.Fprintf(fcode, "\n\t\t//line %v:%v", infile, lineno)
+		fmt.Fprintf(fcode, "\n//line %v:%v", infile, lineno)
 	}
 	fmt.Fprint(fcode, "\n\t\t")