diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index 7056558..b65c488 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -496,7 +496,8 @@
 			return isset($array[$keys[$i]]) ? $this->_reduce_array($array[$keys[$i]], $keys, ($i+1)) : NULL;
 		}
 
-		return $array;
+		// NULL must be returned for empty fields
+		return ($array === '') ? NULL : $array;;
 	}
 
 	// --------------------------------------------------------------------
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 8de9d2f..a20cd10 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -453,6 +453,7 @@
 -  Fixed a bug (#777) - :doc:`Loader Library <libraries/loader>` didn't look for helper extensions in added package paths.
 -  Fixed a bug (#18) - :doc:`APC Cache <libraries/caching>` driver didn't (un)serialize data, resulting in failure to store objects.
 -  Fixed a bug (#188) - :doc:`Unit Testing Library <libraries/unit_testing>` filled up logs with error messages for non-existing language keys.
+-  Fixed a bug (#113) - :doc:`Form Validation Library <libraries/form_validation>` didn't properly handle empty fields that were specified as an array.
 
 Version 2.1.3
 =============