diff --git a/src/Stringy.php b/src/Stringy.php
index ccb6f5a..49fd4a9 100644
--- a/src/Stringy.php
+++ b/src/Stringy.php
@@ -716,7 +716,7 @@ public function length()
      */
     public function lines()
     {
-        $array = $this->split('[\r\n]{1,2}', $this->str);
+        $array = $this->split('[\r\n]{1,2}');
         for ($i = 0; $i < count($array); $i++) {
             $array[$i] = static::create($array[$i], $this->encoding);
         }
diff --git a/tests/StringyTest.php b/tests/StringyTest.php
index 97d5502..762af28 100644
--- a/tests/StringyTest.php
+++ b/tests/StringyTest.php
@@ -311,6 +311,8 @@ public function linesProvider()
             [['fòô', '', 'bàř'], "fòô\r\n\r\nbàř", 'UTF-8'],
             [['fòô', 'bàř', ''], "fòô\r\nbàř\r\n", 'UTF-8'],
             [['', 'fòô', 'bàř'], "\r\nfòô\r\nbàř", 'UTF-8'],
+            [['1111111111111111111'], '1111111111111111111', 'UTF-8'],
+            [['1111111111111111111111'], '1111111111111111111111', 'UTF-8'],
         ];
     }
     /**