diff --git a/build.sh b/build.sh
index 3ba1bf4..362fd25 100755
--- a/build.sh
+++ b/build.sh
@@ -63,6 +63,7 @@ usage()
 
 # check value of input is 'on' or 'off'
 # usage: check_on_off arg_value arg_name
+# refact formance;
 check_on_off()
 {
   if [[ "X$1" != "Xon" && "X$1" != "Xoff" ]]; then