diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index 5848591..7c44140 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -252,7 +252,7 @@
 	 * each array due to the limitations of CI's singleton
 	 *
 	 * @param	array	$data
-	 * @return	void
+	 * @return	CI_Form_validation
 	 */
 	public function set_data(array $data)
 	{
@@ -260,6 +260,8 @@
 		{
 			$this->validation_data = $data;
 		}
+
+		return $this;
 	}
 
 	// --------------------------------------------------------------------
@@ -1536,7 +1538,7 @@
 	 * Prevents subsequent validation routines from being affected by the
 	 * results of any previous validation routine due to the CI singleton.
 	 *
-	 * @return	void
+	 * @return	CI_Form_validation
 	 */
 	public function reset_validation()
 	{
@@ -1545,6 +1547,7 @@
 		$this->_error_array = array();
 		$this->_error_messages = array();
 		$this->error_string = '';
+		return $this;
 	}
 
 }
diff --git a/user_guide_src/source/libraries/form_validation.rst b/user_guide_src/source/libraries/form_validation.rst
index ae66cef..988d6fa 100644
--- a/user_guide_src/source/libraries/form_validation.rst
+++ b/user_guide_src/source/libraries/form_validation.rst
@@ -1001,14 +1001,16 @@
 	.. method:: set_data($data)
 
 		:param	array	$data: Array of data validate
-		:rtype:	void
+		:returns:	CI_Form_validation instance (method chaining)
+		:rtype:	CI_Form_validation
 
 		Permits you to set an array for validation, instead of using the default
 		``$_POST`` array.
 
 	.. method:: reset_validation()
 
-		:rtype: void
+		:returns:	CI_Form_validation instance (method chaining)
+		:rtype:	CI_Form_validation
 
 		Permits you to reset the validation when you validate more than one array.
 		This method should be called before validating each new array.