diff --git a/tools/idf_py_actions/serial_ext.py b/tools/idf_py_actions/serial_ext.py
index 4dc73e2539..76f7cb85c1 100644
--- a/tools/idf_py_actions/serial_ext.py
+++ b/tools/idf_py_actions/serial_ext.py
@@ -216,6 +216,7 @@ def action_extensions(base_actions: Dict, project_path: str) -> Dict:
         'help': 'Serial port.',
         'scope': 'global',
         'envvar': 'ESPPORT',
+        'type': click.Path(),
         'default': None,
     }