diff --git a/oargen.py b/oargen.py
index 099ef07bd101d78bf04f9e8e17ef9d6b1111e8df..abd72c2a5119bdb3238ecf4c9c44a0fa3f027b12 100755
--- a/oargen.py
+++ b/oargen.py
@@ -69,9 +69,9 @@ def main():
         command.append("-n")
         command.append(args.name)
         command.append("-O")
-        command.append(f"{args.name}.%jobid%.stdout")
+        command.append("{}.%jobid%.stdout".format(args.name))
         command.append("-E")
-        command.append(f"{args.name}.%jobid%.stderr")
+        command.append("{}.%jobid%.stderr".format(args.name))
 
     if args.besteffort:
         command.extend(["-t", "besteffort", "-t", "idempotent"])