diff --git a/src/Illuminate/Foundation/Console/KeyGenerateCommand.php b/src/Illuminate/Foundation/Console/KeyGenerateCommand.php
index 9cbd594a7f3..70cc8e04d50 100644
--- a/src/Illuminate/Foundation/Console/KeyGenerateCommand.php
+++ b/src/Illuminate/Foundation/Console/KeyGenerateCommand.php
@@ -141,7 +141,7 @@ protected function writeNewEnvironmentFileWith(string $key): bool
      *
      * @return string
      */
-    protected function keyReplacementPattern(): string
+    protected function keyReplacementPattern()
     {
         $escaped = preg_quote('='.$this->laravel['config']['app.key'], '/');