diff --git a/src/Illuminate/Support/Str.php b/src/Illuminate/Support/Str.php
index 2c603cb167a2..50c73bf2a1b9 100644
--- a/src/Illuminate/Support/Str.php
+++ b/src/Illuminate/Support/Str.php
@@ -341,6 +341,7 @@ public static function finish($value, $cap)
     /**
      * Wrap the string with the given strings.
      *
+     * @param  string  $value
      * @param  string  $before
      * @param  string|null  $after
      * @return string
@@ -1012,6 +1013,7 @@ public static function singular($value)
      * @param  string  $title
      * @param  string  $separator
      * @param  string|null  $language
+     * @param  array<string, string>  $dictionary
      * @return string
      */
     public static function slug($title, $separator = '-', $language = 'en', $dictionary = ['@' => 'at'])