diff --git a/src/Illuminate/Support/Str.php b/src/Illuminate/Support/Str.php
index 3eb1032a27f2..9b576c6d7350 100644
--- a/src/Illuminate/Support/Str.php
+++ b/src/Illuminate/Support/Str.php
@@ -1551,7 +1551,7 @@ public static function toBase64($string): string
      *
      * @param  string  $string
      * @param  bool  $strict
-     * @return string
+     * @return string|false
      */
     public static function fromBase64($string, $strict = false)
     {