diff --git a/system/core/CodeIgniter.php b/system/core/CodeIgniter.php
index 87dd868f966..3718af9b427 100644
--- a/system/core/CodeIgniter.php
+++ b/system/core/CodeIgniter.php
@@ -384,7 +384,7 @@ function &get_instance()
 		 * ReflectionMethod::isConstructor() is the ONLY reliable check,
 		 * knowing which method will be executed as a constructor.
 		 */
-		else
+		elseif ( ! in_array($method, get_class_methods($class)))
 		{
 			$reflection = new ReflectionMethod($class, $method);
 			if ( ! $reflection->isPublic() OR $reflection->isConstructor())