diff --git a/src/Cli/ArgvParserBuilder.php b/src/Cli/ArgvParserBuilder.php
index 73d24c07..e9c4dca0 100644
--- a/src/Cli/ArgvParserBuilder.php
+++ b/src/Cli/ArgvParserBuilder.php
@@ -17,6 +17,7 @@
  */
 class ArgvParserBuilder
 {
+    private Parser $parser;
     public function __construct(
         /**
          * The command line argument parser.