diff --git a/src/Illuminate/Foundation/Console/KeyGenerateCommand.php b/src/Illuminate/Foundation/Console/KeyGenerateCommand.php
index afe2b649e7e..90ebb680c8b 100644
--- a/src/Illuminate/Foundation/Console/KeyGenerateCommand.php
+++ b/src/Illuminate/Foundation/Console/KeyGenerateCommand.php
@@ -96,7 +96,7 @@ protected function generateRandomKey(): string
      * @param  string  $key
      * @return bool
      */
-    protected function setKeyInEnvironmentFile(string $key): bool
+    protected function setKeyInEnvironmentFile($key)
     {
         $currentKey = $this->laravel['config']['app.key'];