diff --git a/index.js b/index.js
index 0bf88a14a6f6a19481766d5b8d8929746853e4b6..b1726bbbeda7933e959d359343dd39c2bd9ff7f3 100644
--- a/index.js
+++ b/index.js
@@ -74,14 +74,15 @@ function Log (options) {
     if (typeof tags !== 'undefined') {
       if (Array.isArray(tags)) {
         tadd = ' #' + tags.join(' #')
-      } else if (tags.includes(' ')) {
+      } else if (typeof tags === 'string' && tags.includes(' ')) {
         tadd = ' #' + tags.split(' ').join(' #')
-      } else if (tags.includes(',')) {
+      } else if (typeof tags === 'string' && tags.includes(',')) {
         tadd = ' #' + tags.split(',').join(' #')
       } else {
         tadd = ' #' + tags
       }
     }
+    
     let msg = this.getDate() + '\t' + this.hostname + '\t' + this.name + '\t' + tag + '\t' + message + tadd
     switch (tag) {
       case 'INFO':