diff --git a/system/libraries/Cache/drivers/Cache_apc.php b/system/libraries/Cache/drivers/Cache_apc.php
index de75719c417..79d91b32020 100644
--- a/system/libraries/Cache/drivers/Cache_apc.php
+++ b/system/libraries/Cache/drivers/Cache_apc.php
@@ -132,7 +132,7 @@ public function get_metadata($id)
 	 */
 	public function is_supported()
 	{
-		if ( ! extension_loaded('apc') OR ! function_exists('apc_store'))
+		if ( ! extension_loaded('apc') OR ini_get('apc.enabled') != "1")
 		{
 			log_message('error', 'The APC PHP extension must be loaded to use APC Cache.');
 			return FALSE;
@@ -148,4 +148,4 @@ public function is_supported()
 // End Class
 
 /* End of file Cache_apc.php */
-/* Location: ./system/libraries/Cache/drivers/Cache_apc.php */
\ No newline at end of file
+/* Location: ./system/libraries/Cache/drivers/Cache_apc.php */
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index a6a2683aaae..3e164352445 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -108,6 +108,7 @@ Bug fixes for 2.1.0
 -  Fixed a bug (#484) - First time _csrf_set_hash() is called, hash is never set to the cookie (in Security.php).
 -  Fixed a bug (#60) - Added _file_mime_type() method to the `File Uploading Library <libraries/file_uploading>` in order to fix a possible MIME-type injection.
 -  Fixed a bug (#537) - Support for all wav type in browser.
+-  Fixed a bug (#576) - Using ini_get() function to detect if apc is enabled or not.
 
 Version 2.0.3
 =============