diff --git a/system/core/Hooks.php b/system/core/Hooks.php
index 29fd882..afbf4b4 100644
--- a/system/core/Hooks.php
+++ b/system/core/Hooks.php
@@ -39,7 +39,7 @@
 class CI_Hooks {
 
 	/**
-	 * Determines wether hooks are enabled
+	 * Determines whether hooks are enabled
 	 *
 	 * @var bool
 	 */
@@ -53,7 +53,7 @@
 	public $hooks =	array();
 
 	/**
-	 * Determines wether hook is in progress, used to prevent infinte loops
+	 * Determines whether hook is in progress, used to prevent infinte loops
 	 *
 	 * @var bool
 	 */
diff --git a/system/core/Output.php b/system/core/Output.php
index 570d4eb..ed294f1 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -74,7 +74,7 @@
 	protected $mime_type		= 'text/html';
 
 	/**
-	 * Determines wether profiler is enabled
+	 * Determines whether profiler is enabled
 	 *
 	 * @var book
 	 */
diff --git a/system/database/DB_query_builder.php b/system/database/DB_query_builder.php
index 1ac9af9..531ca9e 100644
--- a/system/database/DB_query_builder.php
+++ b/system/database/DB_query_builder.php
@@ -324,7 +324,7 @@
 	 * @param	string
 	 * @param	string	the join condition
 	 * @param	string	the type of join
-	 * @param	string	wether not to try to escape identifiers
+	 * @param	string	whether not to try to escape identifiers
 	 * @return	object
 	 */
 	public function join($table, $cond, $type = '', $escape = NULL)
diff --git a/system/helpers/download_helper.php b/system/helpers/download_helper.php
index 5efbc49..09c4de5 100644
--- a/system/helpers/download_helper.php
+++ b/system/helpers/download_helper.php
@@ -46,7 +46,7 @@
 	 *
 	 * @param	string	filename
 	 * @param	mixed	the data to be downloaded
-	 * @param	bool	wether to try and send the actual file MIME type
+	 * @param	bool	whether to try and send the actual file MIME type
 	 * @return	void
 	 */
 	function force_download($filename = '', $data = '', $set_mime = FALSE)