diff --git a/vlib/v/tests/live_test.v b/vlib/v/tests/live_test.v
index 969f458f47..19de3152a5 100644
--- a/vlib/v/tests/live_test.v
+++ b/vlib/v/tests/live_test.v
@@ -44,7 +44,7 @@ import time
 import os
 import live
 
-fn append_to_file(fname, s string) {
+fn append_to_file(fname string, s string) {
 	mut f := os.open_append(fname) or {
 		println('>>>> could not open file \$fname for appending, err: \$err ')
 		return