diff --git a/src/PhpSpreadsheet/Writer/Xls/Parser.php b/src/PhpSpreadsheet/Writer/Xls/Parser.php
index 4bcdb928..00ead3c2 100644
--- a/src/PhpSpreadsheet/Writer/Xls/Parser.php
+++ b/src/PhpSpreadsheet/Writer/Xls/Parser.php
@@ -563,7 +563,7 @@ class Parser
     private function convertString($string)
     {
         // chop away beggining and ending quotes
-        $string = substr($string, 1, -2);
+        $string = substr($string, 1, -1);
         if (strlen($string) > 255) {
             throw new WriterException('String is too long');
         }