diff --git a/src/lib/utils.js b/src/lib/utils.js
index 5608a57..8ad4765 100644
--- a/src/lib/utils.js
+++ b/src/lib/utils.js
@@ -164,7 +164,7 @@ exports.compilePositionLabel = (label, flags) => {
 function toFlagsSet(flags) {
   let flags_set
     if (typeof(flags) == 'string'){
-      const flags_set = new Set(flags.split(',').map(s=>s.trim()))
+      flags_set = new Set(flags.split(',').map(s=>s.trim()))
     } else if (flags.constructor === Array){
       flags_set = new Set(flags)
     } else if (flags.constructor === Set){