diff --git a/moulinette/interfaces/cli.py b/moulinette/interfaces/cli.py
index 5f846930..1d5b89ae 100644
--- a/moulinette/interfaces/cli.py
+++ b/moulinette/interfaces/cli.py
@@ -446,6 +446,9 @@ class Interface(BaseInterface):
         # Set handler for authentication
         if password:
             msignals.set_handler("authenticate", lambda a: a(password=password))
+        else:
+            if os.isatty(1):
+                msignals.set_handler("authenticate", self._do_authenticate)
 
         try:
             ret = self.actionsmap.process(args, timeout=timeout)