diff --git a/system/core/Input.php b/system/core/Input.php
index af4f87c..bb287ea 100644
--- a/system/core/Input.php
+++ b/system/core/Input.php
@@ -137,7 +137,7 @@
 	 */
 	public function __construct()
 	{
-		$this->_allow_get_array		= (config_item('allow_get_array') === TRUE);
+		$this->_allow_get_array		= (config_item('allow_get_array') !== FALSE);
 		$this->_enable_xss		= (config_item('global_xss_filtering') === TRUE);
 		$this->_enable_csrf		= (config_item('csrf_protection') === TRUE);
 		$this->_standardize_newlines	= (bool) config_item('standardize_newlines');
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index c53f30f..ea20106 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -24,6 +24,7 @@
 -  Fixed a regression (#5282) - :doc:`Query Builder <database/query_builder>` method ``count_all_results()`` breaks ``ORDER BY`` clauses for subsequent queries.
 -  Fixed a bug (#5279) - :doc:`Query Builder <database/query_builder>` didn't account for already escaped identifiers while applying database name prefixes.
 -  Fixed a bug (#5331) - :doc:`URL Helper <helpers/url_helper>` function :php:func:`auto_link()` converted e-mail addresses starting with 'www.' to both "url" and "email" links.
+-  Fixed a bug where ``$config['allow_get_array']`` defaulted to ``FALSE`` if it didn't exist in the config file.
 
 Version 3.1.6
 =============