diff --git a/libervia/cli/cmd_call.py b/libervia/cli/cmd_call.py
index af2c4d62..1406935f 100644
--- a/libervia/cli/cmd_call.py
+++ b/libervia/cli/cmd_call.py
@@ -100,6 +100,9 @@ class Common(base.CommandBase):
             kwargs["sources_data"] = SourcesTest()
         elif self.args.sources == "auto" and not sys.stdin.isatty():
             kwargs["sources_data"] = SourcesStdin()
+
+        if not sys.stdout.isatty():
+            kwargs["record_fd"] = 1
         return kwargs
 
     async def start(self):