diff --git a/codearchiver/cli.py b/codearchiver/cli.py
index b115e9d..2d05cd0 100644
--- a/codearchiver/cli.py
+++ b/codearchiver/cli.py
@@ -206,8 +206,9 @@ def main():
 		if args.writeArtefactsFd3:
 			with storage.lock():
 				artefacts = storage.list_new_files()
-			for filename in artefacts:
-				print(filename, file = artefactsFd)
+			with artefactsFd:
+				for filename in artefacts:
+					print(filename, file = artefactsFd)
 
 if __name__ == '__main__':
 	main()