diff --git a/system/libraries/Session/drivers/Session_cookie.php b/system/libraries/Session/drivers/Session_cookie.php
index dc75d8e..65debcb 100644
--- a/system/libraries/Session/drivers/Session_cookie.php
+++ b/system/libraries/Session/drivers/Session_cookie.php
@@ -165,6 +165,8 @@
 	 */
 	public $now;
 
+	// ------------------------------------------------------------------------
+
 	/**
 	 * Default userdata keys
 	 *
@@ -185,6 +187,15 @@
 	protected $data_dirty = FALSE;
 
 	/**
+	 * Standardize newlines flag
+	 *
+	 * @var	bool
+	 */
+	protected $_standardize_newlines;
+
+	// ------------------------------------------------------------------------
+
+	/**
 	 * Initialize session driver object
 	 *
 	 * @return	void
@@ -209,9 +220,11 @@
 			'sess_time_to_update',
 			'time_reference',
 			'cookie_prefix',
-			'encryption_key'
+			'encryption_key',
 		);
 
+		$this->_standardize_newlines = (bool) $config['standardize_newlines'];
+
 		foreach ($prefs as $key)
 		{
 			$this->$key = isset($this->_parent->params[$key])
@@ -695,6 +708,16 @@
 				? array_intersect_key($this->userdata, $this->defaults)
 				: $this->userdata;
 
+		// The Input class will do this and since we use HMAC verification,
+		// unless we standardize here as well, the hash won't match.
+		if ($this->_standardize_newlines)
+		{
+			foreach (array_keys($this->userdata) as $key)
+			{
+				$this->userdata[$key] = preg_replace('/(?:\r\n|[\r\n])/', PHP_EOL, $this->userdata[$key]);
+			}
+		}
+
 		// Serialize the userdata for the cookie
 		$cookie_data = serialize($cookie_data);