diff --git a/jlmkr.py b/jlmkr.py
index 11d7f5e..9950df5 100755
--- a/jlmkr.py
+++ b/jlmkr.py
@@ -239,7 +239,7 @@ def start_jail(jail_name, check_startup_enabled=False):
     config = parse_config(jail_config_path)
 
     if not config:
-        fail(f'Aborting...')
+        fail("Aborting...")
 
     # Only start if the startup setting is enabled in the config
     if check_startup_enabled: