diff --git a/src/wp-admin/plugin-editor.php b/src/wp-admin/plugin-editor.php
index 2167c1ac74..61040ae060 100644
--- a/src/wp-admin/plugin-editor.php
+++ b/src/wp-admin/plugin-editor.php
@@ -94,7 +94,15 @@ default:
 
 	// List of allowable extensions
 	$editable_extensions = array('php', 'txt', 'text', 'js', 'css', 'html', 'htm', 'xml', 'inc', 'include');
-	$editable_extensions = (array) apply_filters('editable_extensions', $editable_extensions);
+
+	/**
+	 * Filter file type extensions editable in the plugin editor.
+	 *
+	 * @since 2.8.0
+	 *
+	 * @param array $editable_extensions An array of editable plugin file extensions.
+	 */
+	$editable_extensions = (array) apply_filters( 'editable_extensions', $editable_extensions );
 
 	if ( ! is_file($real_file) ) {
 		wp_die(sprintf('<p>%s</p>', __('No such file exists! Double check the name and try again.')));