diff --git a/index.js b/index.js
index 9b6b38c..ee95ecd 100644
--- a/index.js
+++ b/index.js
@@ -201,7 +201,7 @@ const actions = (where, message, from) => {
         botSay(where, process.env.PUBLIC_RADIO_STREAM)
         break
       case '!mute':
-        if (exploded[2] && ['on', 'off', 'state'].exploded[2] !== -1) {
+        if (exploded[2] && ['on', 'off', 'state'].indexOf(exploded[2]) !== -1) {
           switch (exploded[2]) {
             case 'on':
               isMute = true