diff --git a/src/wp-load.php b/src/wp-load.php
index 9021ceb747..c022abcee5 100644
--- a/src/wp-load.php
+++ b/src/wp-load.php
@@ -23,6 +23,14 @@ define( 'ABSPATH', dirname(__FILE__) . '/' );
 
 error_reporting( E_CORE_ERROR | E_CORE_WARNING | E_COMPILE_ERROR | E_ERROR | E_WARNING | E_PARSE | E_USER_ERROR | E_USER_WARNING | E_RECOVERABLE_ERROR );
 
+/*
+ * If wp-config.php exists in the WordPress root, or if it exists in the root and wp-settings.php
+ * doesn't, load wp-config.php. The secondary check for wp-settings.php has the added benefit
+ * of avoiding cases where the current directory is a nested installation, e.g. / is WordPress(a)
+ * and /blog/ is WordPress(b).
+ *
+ * If neither set of conditions is true, initiate loading the setup process.
+ */
 if ( file_exists( ABSPATH . 'wp-config.php') ) {
 
 	/** The config file resides in ABSPATH */