diff --git a/parser.js b/parser.js
index 79338dc..811130d 100644
--- a/parser.js
+++ b/parser.js
@@ -106,7 +106,7 @@ class Parser {
             let valid;
             if(arg.type == ARGUMENT_TYPES.COMMANDS)
             {
-              while(this.text.length>startIndex & this.text[startIndex++]!='[');
+              while(this.text.length>startIndex && this.text[startIndex++]!='[');
               console.log({arg:theArgToken,offset:startIndex});
               valid = arg.validator(theArgToken,startIndex+this.offset)
             }else