diff --git a/app-openbis-command-line/src/python/obis/dm/commands/upload.py b/app-openbis-command-line/src/python/obis/dm/commands/upload.py
index d9ee708b584e2d329a364ed97b320948ac29f63c..566410058ad9f902bf2ee5613956f384ef620d06 100644
--- a/app-openbis-command-line/src/python/obis/dm/commands/upload.py
+++ b/app-openbis-command-line/src/python/obis/dm/commands/upload.py
@@ -39,7 +39,7 @@ class Upload(OpenbisCommand):
 
     def run(self):
         with cd(self.data_mgmt.invocation_path):
-            click_echo(f"Uploading files {self.files} under {self.sample_id}")
+            click_echo(f"Uploading files {list(self.files)} under {self.sample_id}")
             ds = self.openbis.new_dataset(type=self.data_set_type, sample=self.sample_id,
                                           files=self.files)
             result = ds.save()