diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index a158225..c221258 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -415,12 +415,9 @@
 	 */
 	public function run($group = '')
 	{
-		// Do we even have any data to process?  Mm?
-		$validation_array = empty($this->validation_data) ? $_POST : $this->validation_data;
-		if (count($validation_array) === 0)
-		{
-			return FALSE;
-		}
+		$validation_array = empty($this->validation_data)
+			? $_POST
+			: $this->validation_data;
 
 		// Does the _field_data array containing the validation rules exist?
 		// If not, we look to see if they were assigned via a config file
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index caa4455..ab08c2f 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -26,6 +26,7 @@
 -  Fixed a bug (#4306) - :doc:`Database <database/index>` method ``version()`` didn't work properly with the 'mssql' driver.
 -  Fixed a bug (#4039) - :doc:`Session Library <libraries/sessions>` could generate multiple (redundant) warnings in case of a read failure with the 'files' driver, due to a bug in PHP.
 -  Fixed a bug where :doc:`Session Library <libraries/sessions>` didn't have proper error handling on PHP 5 (due to a PHP bug).
+-  Fixed a bug (#4312) - :doc:`Form Validation Library <libraries/form_validation>` didn't provide error feedback for failed validation on empty requests.
 
 Version 3.0.3
 =============