diff --git a/oargen.py b/oargen.py
index 1b03de94ebcbc29c830521398878285921a25ca9..a74bc379c7a689ad10c743a4ec55980dfe329339 100755
--- a/oargen.py
+++ b/oargen.py
@@ -62,7 +62,8 @@ def main():
     command.append(ressources)
 
     if args.besteffort:
-        command.append("-t besteffort -t idempotent")
+        command.append("-t besteffort")
+        command.append("-t idempotent")
 
     if args.checkpoint is not None:
         command.append("--checkpoint {}".format(args.checkpoint))