diff --git a/src/threads.js b/src/threads.js
index f74cf729..a7f84f76 100644
--- a/src/threads.js
+++ b/src/threads.js
@@ -4421,7 +4421,6 @@ Process.prototype.reportBasicTextSplit = function (string, delimiter) {
         str = str.trim();
         del = /\s+/;
         break;
-    case isNil(delimiter):
     case '':
     case 'letter':
         return new List(Array.from(str));